Year	kt
1960	0
1961	0
1962	0
1963	95.342
1964	95.342
1965	95.342
1966	113.677
1967	113.677
1968	517.047
1969	594.054
1970	671.061
1971	979.089
1972	2170.864
1973	3076.613
1974	3795.345
1975	3993.363
1976	4184.047
1977	4543.413
1978	4990.787
1979	5397.824
1980	5599.509
1981	5650.847
1982	6215.565
1983	6563.93
1984	6813.286
1985	8247.083
1986	9383.853
1987	8995.151
1988	9603.873
1989	10010.91
1990	10461.951
1991	9944.904
1992	9944.904
1993	12519.138
1994	12262.448
1995	13054.52
1996	13465.224
1997	14502.985
1998	15287.723
1999	15841.44
2000	16156.802
2001	11958.087
2002	12592.478
2003	12984.847
2004	13505.561
2005	14304.967
2006	15559.081
2007	20883.565
2008	22988.423
2009	24194.866
2010	24554.232
2011	24304.876
2012	24414.886
2013	26200.715
2014	28375.246
2015	28261.569
2016	27194.472