Year	kt
1962	3.667
1963	3.667
1964	7.334
1965	7.334
1966	11.001
1967	3.667
1968	14.668
1969	18.335
1970	18.335
1971	22.002
1972	22.002
1973	25.669
1974	25.669
1975	25.669
1976	25.669
1977	29.336
1978	29.336
1979	29.336
1980	29.336
1981	44.004
1982	36.67
1983	40.337
1984	40.337
1985	47.671
1986	55.005
1987	62.339
1988	66.006
1989	66.006
1990	66.006
1991	66.006
1992	69.673
1993	73.34
1994	80.674
1995	84.341
1996	95.342
1997	99.009
1998	102.676
1999	102.676
2000	102.676
2001	106.343
2002	113.677
2003	121.011
2004	124.678
2005	132.012
2006	143.013
2007	150.347
2008	161.348
2009	165.015
2010	172.349
2011	176.016
2012	176.016
2013	176.016
2014	179.683