Year	kt
1960	91.675
1961	102.676
1962	102.676
1963	102.676
1964	102.676
1965	113.677
1966	113.677
1967	124.678
1968	128.345
1969	143.013
1970	2368.882
1971	2493.56
1972	2555.899
1973	2266.206
1974	2258.872
1975	2258.872
1976	1598.812
1977	1507.137
1978	913.083
1979	1419.129
1980	1433.797
1981	1642.816
1982	1697.821
1983	1804.164
1984	1811.498
1985	1848.168
1986	1686.82
1987	1653.817
1988	2203.867
1989	3256.296
1990	2614.571
1991	2200.2
1992	2614.571
1993	2449.556
1994	2632.906
1995	2618.238
1996	2684.244
1997	4532.412
1998	6446.586
1999	9039.155
2000	11928.751
2001	13527.563
2002	13516.562
2003	14748.674
2004	16061.46
2005	15570.082
2006	14345.304
2007	8771.464
2008	4829.439
2009	6384.247
2010	10234.597
2011	10458.284
2012	9816.559
2013	9299.512
2014	8302.088
2015	9119.829
2016	9959.572