Year	kt
1960	1840.834
1961	1903.173
1962	2038.852
1963	2207.534
1964	2310.21
1965	2379.883
1966	2684.244
1967	2841.925
1968	3039.943
1969	9028.154
1970	20575.537
1971	18041.64
1972	17480.589
1973	19204.079
1974	24194.866
1975	22907.749
1976	22852.744
1977	20461.86
1978	18848.38
1979	24070.188
1980	13292.875
1981	12152.438
1982	12636.482
1983	16046.792
1984	25159.287
1985	27414.492
1986	28565.93
1987	30626.784
1988	38426.493
1989	42625.208
1990	40047.307
1991	49658.514
1992	52691.123
1993	60740.188
1994	73347.334
1995	81642.088
1996	81312.058
1997	90989.271
1998	98733.975
1999	114381.064
2000	120545.291
2001	127758.28
2002	143933.417
2003	158597.75
2004	179044.942
2005	200324.543
2006	221721.488
2007	236712.184
2008	247078.793
2009	261277.417
2010	277448.887
2011	293503.013
2012	292512.923
2013	295175.165
2014	335281.144
2015	357063.124
2016	381015.968