Year	kt
1960	2716032.7366565783
1961	2708842.029713841
1962	2764721.516242545
1963	2897425.0887810965
1964	2957731.6094706007
1965	2992739.564072269
1966	3002491.9335002853
1967	3012166.9372827713
1968	3014578.1665684115
1969	3071712.6957912454
1970	3064044.900701081
1971	2907366.574231515
1972	2870149.4006408644
1973	2997024.761216266
1974	2985295.2529143384
1975	2943298.541438292
1976	3140525.345194443
1977	3182491.9699874152
1978	3252929.1931651304
1979	3436410.6808532835
1980	3567444.4873718084
1981	3581064.9201089484
1982	3546336.8997504455
1983	3632056.6569323726
1984	3760954.346357062
1985	3967250.821749068
1986	3881118.454424266
1987	4042014.920033242
1988	4143130.1931711314
1989	4206796.797820945
1990	4100979.48826323
1991	4105535.3919241223
1992	4024944.5367928576
1993	3981933.1039595515
1994	3985541.5317801656
1995	3985933.9116346445
1996	4096849.061901171
1997	4148793.5538513605
1998	4115290.9150616033
1999	4086874.545974274
2000	4262737.729910394
2001	4241882.9240000015
2002	4278978.296000001
2003	4332967.537000001
2004	4414048.574000002
2005	4397114.368000001
2006	4457348.510000003
2007	4500512.767000002
2008	4401228.742000002
2009	3977466.555
2010	4200317.479
2011	4120068.851000002
2012	3945174.9529999997
2013	3962578.535
2014	3888974.510999999
2015	3964648.466716212
2016	3741659.588085775