Year	kt
1960	2594922.8049025005
1961	2332386.6839213907
1962	2231339.8239464676
1963	2302767.2258693874
1964	2358042.729001106
1965	2466094.2881854665
1966	2561201.9683557833
1967	2488613.849053914
1968	2545196.934496528
1969	2698184.835211518
1970	2976570.0485590138
1971	3111968.910381579
1972	3223528.6324778227
1973	3272663.4387547118
1974	3299541.88238812
1975	3561753.409225265
1976	3648635.777496443
1977	3823671.583717927
1978	3980238.146323162
1979	4075490.555901552
1980	4193064.1322764433
1981	4042730.6692999424
1982	4256806.592752261
1983	4394413.144779739
1984	4605207.0835764995
1985	5066195.563534637
1986	5256944.185941986
1987	5464225.843509174
1988	5656793.870507849
1989	5603364.103795375
1990	5324689.9768586485
1991	5297867.7267678
1992	4791927.9012427
1993	4838560.32645028
1994	4910780.566552777
1995	5115791.622830977
1996	5256712.253970118
1997	5135290.984398212
1998	4900397.296836395
1999	4891860.440616145
2000	4949337.950642469
2001	4995299.998529152
2002	5384424.765281744
2003	6086601.69312982
2004	6730159.517569542
2005	7422508.026088457
2006	8099323.041498049
2007	8285464.394161576
2008	9268937.830703853
2009	9061553.590166219
2010	10140538.164167764
2011	11180084.84598386
2012	11562149.639429256
2013	11409528.920835089
2014	11445387.597250398
2015	11429732.117834482
2016	11222886.739940777