Year	kt
1960	410.704
1961	546.383
1962	726.066
1963	707.731
1964	1085.432
1965	1316.453
1966	1092.766
1967	1364.124
1968	1290.784
1969	1338.455
1970	2159.863
1971	6314.574
1972	5999.212
1973	7381.671
1974	6981.968
1975	8063.733
1976	6329.242
1977	9680.88
1978	6442.919
1979	6706.943
1980	7755.705
1981	2720.914
1982	2192.866
1983	2005.849
1984	1855.502
1985	1510.804
1986	1411.795
1987	1422.796
1988	1540.14
1989	1943.51
1990	1840.834
1991	1840.834
1992	1848.168
1993	1756.493
1994	1745.492
1995	1738.158
1996	1727.157
1997	1521.805
1998	1910.507
1999	1950.844
2000	1947.177
2001	1862.836
2002	1925.175
2003	1958.178
2004	1965.512
2005	1822.499
2006	1771.161
2007	1793.163
2008	2357.881
2009	1602.479
2010	2383.55
2011	1796.83
2012	1899.506
2013	2867.594
2014	2346.88
2015	2009.516
2016	1782.162