Year	kt
1960	11331.03
1961	10630.633
1962	11906.749
1963	12970.179
1964	14370.973
1965	14194.957
1966	15885.444
1967	15045.701
1968	15350.062
1969	16178.804
1970	17495.257
1971	17715.277
1972	18918.053
1973	19259.084
1974	19959.481
1975	21019.244
1976	23644.816
1977	23956.511
1978	20436.191
1979	25045.61
1980	24213.201
1981	27264.145
1982	31169.5
1983	34678.819
1984	38862.866
1985	46838.591
1986	52269.418
1987	55536.715
1988	53769.221
1989	58771.009
1990	65873.988
1991	68910.264
1992	66948.419
1993	62221.656
1994	62386.671
1995	64751.886
1996	73431.675
1997	81939.115
1998	85375.094
1999	78099.766
2000	87215.928
2001	72899.96
2002	76024.244
2003	82327.817
2004	85870.139
2005	87586.295
2006	102518.319
2007	113948.358
2008	114634.087
2009	119459.859
2010	122690.486
2011	130717.549
2012	133288.116
2013	126364.82
2014	138861.956
2015	132983.755
2016	148099.129