Year	kt
1960	410.704
1961	616.056
1962	660.06
1963	696.73
1964	700.397
1965	696.73
1966	718.732
1967	726.066
1968	748.068
1969	748.068
1970	792.072
1971	814.074
1972	832.409
1973	803.073
1974	839.743
1975	843.41
1976	887.414
1977	902.082
1978	902.082
1979	946.086
1980	964.421
1981	990.09
1982	982.756
1983	953.42
1984	979.089
1985	993.757
1986	997.424
1987	993.757
1988	1026.76
1989	1045.095
1990	1004.758
1991	1026.76
1992	1059.763
1993	1089.099
1994	1125.769
1995	1166.106
1996	1235.779
1997	1290.784
1998	1364.124
1999	1433.797
2000	1492.469
2001	1562.142
2002	1624.481
2003	1701.488
2004	1763.827
2005	1826.166
2006	1892.172
2007	1969.179
2008	1998.515
2009	2112.192
2010	2486.226
2011	2596.236
2012	2423.887
2013	2112.192
2014	2167.197
2015	2453.223
2016	2746.583