Year	kt
1960	2365.215
1961	4033.7
1962	5111.798
1963	5834.197
1964	6472.255
1965	7253.326
1966	7854.714
1967	8214.08
1968	9149.165
1969	9112.495
1970	10289.602
1971	11030.336
1972	12478.801
1973	14198.624
1974	14935.691
1975	15735.097
1976	16479.498
1977	16919.538
1978	16439.161
1979	18030.639
1980	19581.78
1981	20502.197
1982	23267.115
1983	26285.056
1984	27322.817
1985	28833.621
1986	30989.817
1987	36728.672
1988	42265.842
1989	44645.725
1990	43248.598
1991	47322.635
1992	48342.061
1993	40839.379
1994	42713.216
1995	53237.506
1996	57590.235
1997	61554.262
1998	61664.272
1999	67674.485
2000	69493.317
2001	64861.896
2002	62669.03
2003	69126.617
2004	82980.543
2005	82034.457
2006	83937.63
2007	87248.931
2008	90193.532
2009	88066.672
2010	86999.575
2011	92661.423
2012	95459.344
2013	90835.257
2014	96691.456
2015	98359.941
2016	102268.963