Year	kt
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	33.003
1969	33.003
1970	33.003
1971	33.003
1972	40.337
1973	66.006
1974	66.006
1975	73.34
1976	73.34
1977	95.342
1978	95.342
1979	84.341
1980	73.34
1981	132.012
1982	172.349
1983	201.685
1984	194.351
1985	187.017
1986	190.684
1987	95.342
1988	190.684
1989	363.033
1990	509.713
1991	601.388
1992	465.709
1993	535.382
1994	484.044
1995	465.709
1996	495.045
1997	451.041
1998	462.042
1999	432.706
2000	473.043
2001	480.377
2002	476.71
2003	931.418
2004	1136.77
2005	894.748
2006	762.736
2007	891.081
2008	777.404
2009	1345.789
2010	1455.799
2011	2405.552
2012	2636.573
2013	2783.253
2014	3278.298
2015	2867.594
2016	2999.606