Year	kt
1960	2203386.433080674
1961	2308628.422232709
1962	2456653.032286348
1963	2616637.8623561338
1964	2802895.441511217
1965	3016947.618345019
1966	3228428.943899601
1967	3459316.819141511
1968	3751150.1610304755
1969	4055162.265161792
1970	4670585.121155347
1971	4894614.743989327
1972	5290760.277195182
1973	5620925.925561139
1974	5435316.02609464
1975	5238206.832034539
1976	5484849.61503858
1977	5664856.886524096
1978	5796915.99357944
1979	5820466.8985746885
1980	5469484.109788602
1981	5088092.16359934
1982	4861058.578528746
1983	4755721.225496186
1984	4808207.121241455
1985	4722077.643145121
1986	4870499.602700958
1987	4974569.410821508
1988	5155844.227219037
1989	5276360.331235543
1990	5067473.697930312
1991	5057369.100089426
1992	5185402.024
1993	5253589.889
1994	5340343.774999998
1995	5355279.466000001
1996	5488710.594999999
1997	5537030.654000001
1998	5557298.163
1999	5603605.038999998
2000	5628217.942999999
2001	5645562.852999999
2002	5607675.409000001
2003	5709214.638999998
2004	5752947.280999999
2005	5765121.720999999
2006	5673670.407999998
2007	5601734.868999999
2008	5433181.213999999
2009	5185317.682999998
2010	5181122.634999999
2011	5067665.654999999
2012	5002305.0469999965
2013	4968770.3319999995
2014	4919764.543999998
2015	5160782.164922973
2016	5162407.572378134