Year	kt
1960	150.347
1961	150.347
1962	216.353
1963	289.693
1964	513.38
1965	1686.82
1966	1650.15
1967	2779.586
1968	6270.57
1969	12262.448
1970	23124.102
1971	37256.72
1972	52702.124
1973	57040.185
1974	68217.201
1975	71440.494
1976	74099.069
1977	79075.188
1978	81590.75
1979	89265.781
1980	88495.711
1981	89680.152
1982	93391.156
1983	97248.84
1984	99691.062
1985	108029.82
1986	108356.183
1987	107597.114
1988	105950.631
1989	104795.526
1990	108110.494
1991	116529.926
1992	116152.225
1993	132331.029
1994	137919.537
1995	149144.224
1996	173977.148
1997	174567.535
1998	181802.526
1999	192840.196
2000	200174.196
2001	198454.373
2002	196635.541
2003	196697.88
2004	200980.936
2005	195759.128
2006	185660.21
2007	187724.731
2008	194446.342
2009	178879.927
2010	194259.325
2011	161109.645
2012	152044.821
2013	150666.029
2014	137281.479
2015	141322.513
2016	158960.783