Year	kt
1960	21554.626
1961	22984.756
1962	25999.03
1963	22383.368
1964	34187.441
1965	38067.127
1966	42456.526
1967	45100.433
1968	55569.718
1969	58345.637
1970	62676.364
1971	67524.138
1972	76548.625
1973	81935.448
1974	83585.598
1975	85983.816
1976	99009
1977	102037.942
1978	104637.845
1979	112664.908
1980	112133.193
1981	110116.343
1982	110417.037
1983	114124.374
1984	121330.029
1985	125327.059
1986	115877.2
1987	119217.837
1988	127307.239
1989	138535.593
1990	125378.397
1991	126896.535
1992	133717.155
1993	141912.9
1994	148891.201
1995	153705.972
1996	161325.998
1997	162532.441
1998	156012.515
1999	162946.812
2000	170075.46
2001	164626.298
2002	167992.604
2003	182605.599
2004	178703.911
2005	184805.799
2006	181828.195
2007	181153.467
2008	180970.117
2009	179620.661
2010	180251.385
2011	191146.042
2012	190460.313
2013	198571.717
2014	202488.073
2015	199946.842
2016	217027.728