Year	kt
1960	1158.772
1961	1224.778
1962	1239.446
1963	1393.46
1964	1459.466
1965	953.42
1966	1041.428
1967	891.081
1968	931.418
1969	1463.133
1970	1507.137
1971	1778.495
1972	1796.83
1973	2324.878
1974	1554.808
1975	2497.227
1976	3465.315
1977	2266.206
1978	2346.88
1979	3366.306
1980	2464.224
1981	656.393
1982	667.394
1983	656.393
1984	924.084
1985	1540.14
1986	575.719
1987	1921.508
1988	2896.93
1989	2482.559
1990	3692.669
1991	3531.321
1992	4360.063
1993	4899.112
1994	6090.887
1995	6090.887
1996	6226.566
1997	5859.866
1998	5518.835
1999	5947.874
2000	5892.869
2001	5163.136
2002	4301.391
2003	2918.932
2004	1870.17
2005	12449.465
2006	11969.088
2007	12038.761
2008	15262.054
2009	16714.186
2010	14829.348
2011	13919.932
2012	13164.53
2013	13069.188
2014	12643.816
2015	12995.848
2016	14297.633