Year	kt
1960	1122.102
1961	1012.092
1962	1107.434
1963	1224.778
1964	1217.444
1965	1323.787
1966	1422.796
1967	1371.458
1968	1536.473
1969	1213.777
1970	1345.789
1971	1411.795
1972	1419.129
1973	1686.82
1974	1664.818
1975	1536.473
1976	1631.815
1977	1837.167
1978	1859.169
1979	1873.837
1980	1738.158
1981	1580.477
1982	1422.796
1983	1327.454
1984	1525.472
1985	1323.787
1986	1459.466
1987	1565.809
1988	1554.808
1989	1613.48
1990	1694.154
1991	1470.467
1992	1595.145
1993	1763.827
1994	1712.489
1995	1697.821
1996	1925.175
1997	1840.834
1998	1793.163
1999	1782.162
2000	1719.823
2001	1686.82
2002	1763.827
2003	1778.495
2004	1800.497
2005	1785.829
2006	1892.172
2007	1840.834
2008	1694.154
2009	1661.151
2010	1551.141
2011	1466.8
2012	1448.465
2013	1529.139
2014	1653.817
2015	1635.482
2016	1686.82