Year	kt
1960	436.373
1961	1026.76
1962	374.034
1963	216.353
1964	707.731
1965	627.057
1966	850.744
1967	638.058
1968	1155.105
1969	1448.465
1970	1243.113
1971	1745.492
1972	1639.149
1973	1701.488
1974	1422.796
1975	1375.125
1976	1125.769
1977	1719.823
1978	2057.187
1979	1895.839
1980	2328.545
1981	1595.145
1982	1719.823
1983	1287.117
1984	979.089
1985	766.403
1986	770.07
1987	781.071
1988	806.74
1989	836.076
1990	828.742
1991	817.741
1992	832.409
1993	909.416
1994	876.413
1995	935.085
1996	953.42
1997	1015.759
1998	1026.76
1999	1081.765
2000	1213.777
2001	1444.798
2002	1334.788
2003	1613.48
2004	1639.149
2005	1437.464
2006	1518.138
2007	1840.834
2008	1749.159
2009	1965.512
2010	2115.859
2011	2427.554
2012	2317.544
2013	3160.954
2014	5526.169
2015	3520.32
2016	5625.178