Year	kt
1960	47.671
1961	51.338
1962	55.005
1963	55.005
1964	55.005
1965	47.671
1966	55.005
1967	62.339
1968	66.006
1969	66.006
1970	69.673
1971	80.674
1972	73.34
1973	84.341
1974	77.007
1975	88.008
1976	77.007
1977	77.007
1978	69.673
1979	91.675
1980	88.008
1981	51.338
1982	22.002
1983	36.67
1984	33.003
1985	44.004
1986	40.337
1987	47.671
1988	69.673
1989	69.673
1990	143.013
1991	198.018
1992	234.688
1993	238.355
1994	282.359
1995	275.025
1996	282.359
1997	293.36
1998	308.028
1999	319.029
2000	333.697
2001	344.698
2002	348.365
2003	355.699
2004	385.035
2005	399.703
2006	418.038
2007	414.371
2008	425.372
2009	462.042
2010	465.709
2011	451.041
2012	462.042
2013	491.378
2014	528.048