Year	kt
1960	4968.785
1961	4682.759
1962	5672.849
1963	5423.493
1964	6175.228
1965	6948.965
1966	8371.761
1967	8129.739
1968	8540.443
1969	9424.19
1970	8910.81
1971	8991.484
1972	9380.186
1973	9017.153
1974	9548.868
1975	11070.673
1976	11529.048
1977	15067.703
1978	17722.611
1979	18478.013
1980	20003.485
1981	19739.461
1982	21569.294
1983	23945.51
1984	29020.638
1985	34898.839
1986	35151.862
1987	40267.327
1988	39808.952
1989	39962.966
1990	35749.583
1991	41037.397
1992	39442.252
1993	40443.343
1994	42115.495
1995	44403.703
1996	46893.596
1997	47678.334
1998	46607.57
1999	48217.383
2000	51249.992
2001	50644.937
2002	48826.105
2003	52379.428
2004	54480.619
2005	52815.801
2006	52269.418
2007	55346.031
2008	56006.091
2009	44495.378
2010	58543.655
2011	64165.166
2012	62944.055
2013	68840.591
2014	73666.363
2015	74469.436
2016	67318.786