Year	kt
1960	14620.329
1961	15276.722
1962	16772.858
1963	19596.448
1964	22951.753
1965	25316.968
1966	24565.233
1967	17088.22
1968	20073.158
1969	15104.373
1970	16604.176
1971	18514.683
1972	21323.605
1973	19442.434
1974	20282.177
1975	23138.77
1976	26893.778
1977	29596.357
1978	31154.832
1979	33135.012
1980	38734.521
1981	42632.542
1982	47043.943
1983	47887.353
1984	52980.816
1985	51906.385
1986	59955.45
1987	57531.563
1988	55533.048
1989	50806.285
1990	52115.404
1991	51884.383
1992	53175.167
1993	62808.376
1994	53134.83
1995	58151.286
1996	53695.881
1997	70439.403
1998	82661.514
1999	79603.236
2000	85389.762
2001	66486.377
2002	57179.531
2003	73354.668
2004	75697.881
2005	79276.873
2006	83757.947
2007	84832.378
2008	92481.74
2009	98799.981
2010	94333.575
2011	101069.854
2012	97780.555
2013	97292.844
2014	118612.782
2015	112114.858
2016	114876.109