Year	kt
1960	575.719
1961	1771.161
1962	1591.478
1963	1100.1
1964	1499.803
1965	1133.103
1966	535.382
1967	891.081
1968	586.72
1969	678.395
1970	1917.841
1971	2024.184
1972	1510.804
1973	2409.219
1974	1613.48
1975	1760.16
1976	2390.884
1977	2926.266
1978	2779.586
1979	2658.575
1980	2288.208
1981	2874.928
1982	3622.996
1983	1664.818
1984	2394.551
1985	1947.177
1986	1628.148
1987	2438.555
1988	2478.892
1989	1650.15
1990	1892.172
1991	1859.169
1992	843.41
1993	2009.516
1994	2412.886
1995	1664.818
1996	2064.521
1997	2728.248
1998	3003.273
1999	2101.191
2000	2618.238
2001	2097.524
2002	3263.63
2003	3747.674
2004	4250.053
2005	5375.822
2006	3736.673
2007	5764.524
2008	6560.263
2009	3674.334
2010	4118.041
2011	3894.354
2012	2464.224
2013	4558.081
2014	2343.213
2015	3982.362
2016	3802.679