Year	kt
1960	6384.247
1961	8041.731
1962	11859.078
1963	11668.394
1964	13465.224
1965	15779.101
1966	17025.881
1967	19831.136
1968	19842.137
1969	19611.116
1970	20626.875
1971	20102.494
1972	21572.961
1973	24040.852
1974	25111.616
1975	25738.673
1976	25203.291
1977	26523.411
1978	33531.048
1979	40916.386
1980	43827.984
1981	47348.304
1982	51884.383
1983	51943.055
1984	52489.438
1985	54627.299
1986	48477.74
1987	49159.802
1988	49673.182
1989	88228.02
1990	52966.148
1991	55313.028
1992	55657.726
1993	55111.343
1994	56948.51
1995	56966.845
1996	62797.375
1997	65826.317
1998	71147.134
1999	69860.017
2000	81268.054
2001	82954.874
2002	92247.052
2003	101986.604
2004	105734.278
2005	105602.266
2006	118033.396
2007	117369.669
2008	118664.12
2009	123533.896
2010	124223.292
2011	130812.891
2012	135836.681
2013	142393.277
2014	138616.267
2015	148099.129
2016	151579.112