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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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