Year	kt
1960	1822.499
1961	1529.139
1962	1301.785
1963	1595.145
1964	1206.443
1965	762.736
1966	898.415
1967	619.723
1968	473.043
1969	561.051
1970	432.706
1971	553.717
1972	524.381
1973	355.699
1974	440.04
1975	546.383
1976	447.374
1977	509.713
1978	546.383
1979	652.726
1980	707.731
1981	792.072
1982	861.745
1983	1199.109
1984	1884.838
1985	3674.334
1986	8063.733
1987	8225.081
1988	6919.629
1989	6285.238
1990	6952.632
1991	13531.23
1992	12519.138
1993	21327.272
1994	26670.091
1995	25195.957
1996	27583.174
1997	29413.007
1998	32100.918
1999	37198.048
2000	42016.486
2001	58866.351
2002	63259.417
2003	65756.644
2004	77733.066
2005	88642.391
2006	111469.466
2007	128781.373
2008	173254.749
2009	173559.11
2010	129426.765
2011	184743.46
2012	192183.803
2013	79401.551
2014	41488.438
2015	153478.618
2016	213852.106