Year	kt
1960	0
1961	0
1962	0
1963	0
1964	0
1965	124.678
1966	187.017
1967	568.385
1968	876.413
1969	909.416
1970	825.075
1971	568.385
1972	381.368
1973	385.035
1974	839.743
1975	2225.869
1976	3894.354
1977	4968.785
1978	5298.815
1979	5669.182
1980	7253.326
1981	7898.718
1982	8756.796
1983	9207.837
1984	9299.512
1985	8958.481
1986	9442.525
1987	10791.981
1988	12273.449
1989	11030.336
1990	11122.011
1991	9515.865
1992	8379.095
1993	7832.712
1994	7715.368
1995	9446.192
1996	10711.307
1997	8474.437
1998	7165.318
1999	6153.226
2000	6714.277
2001	6274.237
2002	5507.834
2003	5727.854
2004	5709.519
2005	6420.917
2006	6644.604
2007	6893.96
2008	6673.94
2009	4950.45
2010	5269.479
2011	6024.881
2012	5614.177
2013	5493.166
2014	5412.492
2015	5944.207
2016	6153.226