Year	kt
1960	19460.769
1961	21327.272
1962	24906.264
1963	27128.466
1964	28144.225
1965	30839.47
1966	35705.579
1967	32724.308
1968	42284.177
1969	45386.459
1970	49372.488
1971	55489.044
1972	58925.023
1973	61799.951
1974	60677.849
1975	61887.959
1976	63490.438
1977	68613.237
1978	75378.852
1979	82731.187
1980	83244.567
1981	89786.495
1982	94483.922
1983	99251.022
1984	106192.653
1985	116856.289
1986	121957.086
1987	127776.615
1988	133724.489
1989	150838.378
1990	158297.056
1991	166558.807
1992	188208.775
1993	187031.668
1994	199118.1
1995	216459.343
1996	243360.455
1997	244401.883
1998	263107.25
1999	285483.284
2000	303752.278
2001	298068.428
2002	284834.225
2003	293851.378
2004	296858.318
2005	300011.938
2006	316902.14
2007	335739.519
2008	403403.003
2009	454836.345
2010	414257.323
2011	412508.164
2012	435357.241
2013	461172.921
2014	510915.776
2015	599316.145
2016	648956.324