Year	kt
1960	14246.295
1961	16765.524
1962	21873.655
1963	20447.192
1964	27597.842
1965	31778.222
1966	39746.613
1967	47626.996
1968	56930.175
1969	55797.072
1970	72030.881
1971	84146.649
1972	97424.856
1973	106904.051
1974	123211.2
1975	125910.112
1976	141912.9
1977	134241.536
1978	146060.277
1979	144131.435
1980	147754.431
1981	131733.308
1982	124017.94
1983	115140.133
1984	111905.839
1985	108708.215
1986	99801.072
1987	103394.732
1988	117663.029
1989	127252.234
1990	119514.864
1991	123900.596
1992	129940.145
1993	124421.31
1994	134410.218
1995	138278.903
1996	139206.654
1997	142708.639
1998	151271.084
1999	158957.116
2000	160867.623
2001	167075.854
2002	168025.607
2003	173592.113
2004	179297.965
2005	181901.535
2006	181505.499
2007	182616.6
2008	174552.867
2009	161872.381
2010	155506.469
2011	145832.923
2012	133093.765
2013	128627.359
2014	129038.063
2015	136577.415
2016	140244.415