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                                          Kumtor Production and Reserves

                                          PRODUCTION

                                          2019

                                          2018

                                          2017

                                          2016

                                          Tonnes ore mined (000s)

                                          10,970

                                          7,356

                                          5,084

                                          8,911

                                          Tonnes milled (000s)

                                          5,968

                                          6,325

                                          6,246

                                          6,303

                                          Average mill head grade
                                          (grams/tonne)

                                          3.69

                                          3.29

                                          3.58

                                          3.44

                                          Mill Recovery (%)

                                          83.5

                                          79.3

                                          79.1

                                          79.2

                                          Ounces of gold produced (000s)

                                          600

                                          535

                                          563

                                          551


                                          UNIT COSTS

                                          Mining costs – total - $ per tonne mined material

                                          1.26

                                          1.17

                                          1.10

                                          1.27

                                          Milling costs - $ per tonne milled material

                                          12.00

                                          10.65

                                          10.69

                                          9.87

                                          Production costs per ounce of gold sold - $(2)

                                          381

                                          394

                                          nr

                                          nr

                                          All-in Sustaining Costs(1) on a by-product basis per
                                          ounce sold – $

                                          598

                                          694

                                          698

                                          640

                                          (1) Non-GAAP measure. See discussion under “Non-GAAP Measures” in Company’s MD&A and Annual Information Form

                                          (2) Production costs per ounce of gold sold are included as a new measure and is considered the nearest GAAP measure to All-in Sustaining Costs, not reported prior to 2018.

                                           

                                          RESERVES AND RESOURCES

                                           

                                          The following table shows Kumtor’s estimated gold reserves and resources at December 31, 2019:

                                           

                                           

                                          TONNES
                                          (000s) 

                                          GRADE
                                          Grams/tonne

                                          CONTAINED GOLD
                                          Ounces (000s) 

                                          Proven

                                          16,311

                                          1.83

                                          958

                                          Probable

                                          26,984

                                          2.60

                                          2,256

                                          Total reserves

                                          43,295

                                          2.31

                                          3,214

                                          Measured

                                          21,308

                                          4.10

                                          2,807

                                          Indicated

                                          43,191

                                          2.50

                                          3,468

                                          Total measured and indicated resources

                                          64,499

                                          3.03

                                          6,275

                                           

                                           

                                           

                                           

                                          Inferred resources – Open Pit

                                          20,987

                                          20.1

                                          1,356

                                          Inferred resources - Underground

                                          12,883

                                          7.54

                                          3,125

                                          PRODUCTION

                                          1997

                                          1998

                                          1999

                                          2000

                                          2001

                                          2002

                                          2003

                                          2004

                                          2005

                                          Tonnes ore mined (000s)

                                          5,017

                                          5,349

                                          8,054

                                          6,518

                                          5,606

                                          5,141

                                          4,634

                                          3,303

                                          6,135

                                          Tonnes ore milled (000s)

                                          4,023

                                          5,254

                                          5,298

                                          5,498

                                          5,470

                                          5,611

                                          5,631

                                          5,654

                                          5,649

                                          Mill feed grade 
                                          (grams/tonne)

                                          5.55

                                          4.77

                                          4.49

                                          4.65

                                          5.15

                                          3.71

                                          4.54

                                          4.4

                                          3.4

                                          Recovery (%) 

                                          73.3

                                          78.5

                                          79.4

                                          81.5

                                          83.1

                                          78.1

                                          82.6

                                          82.1

                                          81.2

                                          Ounces of gold poured (1) (000s)

                                          502

                                          646

                                          610

                                          670

                                          753

                                          529

                                          678

                                          657

                                          501

                                          UNIT PRODUCTION CASH COSTS (2) 

                                           

                                           

                                          per tonne milled - $

                                          24.00

                                          22.20

                                          20.60

                                          18.60

                                          19.50

                                          20.40

                                          24.00

                                          23.24

                                          24.40

                                          per ounce - $ 

                                          193

                                          181

                                          179

                                          153

                                          141

                                          216

                                          191

                                          200

                                          274

                                          Table Continued Below

                                          PRODUCTION

                                          2006

                                          2007

                                          2008

                                          2009

                                          2010

                                          2011

                                          2012

                                          2013

                                          2014

                                          2015

                                          Tonnes ore mined (000s)

                                          3,887

                                          5,182

                                          4,967

                                          4,464

                                          5,765

                                          6,020

                                          4,955

                                          7,289

                                          8,640

                                          6,583

                                          Tonnes ore milled (000s)

                                          5,696

                                          5,545

                                          5,577

                                          5,780

                                          5,594

                                          5,815

                                          4,756

                                          5.596

                                          5,840

                                          5,729

                                          Mill feed grade 
                                          (grams/tonne)

                                          2.3

                                          2.4

                                          3.9

                                          3.7

                                          4.0

                                          3.8

                                          2.8

                                          4.3

                                          3.9

                                          3.6

                                          Recovery (%) 

                                          73.0

                                          72.7

                                          79.7

                                          76.7

                                          79.5

                                          80.8

                                          75.6

                                          79.3

                                          78.0

                                          78.8

                                          Ounces of gold poured (1) (000s)

                                          304

                                          301

                                          556

                                          525

                                          568

                                          583

                                          315

                                          600

                                          567

                                          521

                                          UNIT PRODUCTION CASH COSTS (2) 

                                           

                                           

                                           

                                          per tonne milled – $

                                          28.99

                                          29.27

                                          43.64

                                          41.80

                                          41.5(3)

                                          48.38

                                          35.28

                                          37.11

                                          34.23

                                          29.59

                                          per ounce – $

                                          544

                                          540

                                          438

                                          460

                                          409(3)

                                          482

                                          532

                                          357

                                          356

                                          326

                                          (1) Centerra’s equity interest is 100%
                                          (2) Unit production cash cost per ounce is a non-GAAP measure, Starting in 2013 unit cost measures are adjusted operating costs on a sales basis, which is a non-GAAP measure.  As a result of Kumtor’s restated Investment Agreement signed in 2009, operating costs and total cash costs per ounce measures for 2009, 2008 and 2007 have been restated to exclude operating and revenue-based taxes.
                                          (3) Restated to exclude community investments costs.

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