Year	kt
1960	6882.959
1961	5984.544
1962	6255.902
1963	7414.674
1964	5177.804
1965	4429.736
1966	3567.991
1967	2750.25
1968	2412.886
1969	2317.544
1970	2156.196
1971	1463.133
1972	1301.785
1973	1235.779
1974	1045.095
1975	773.737
1976	737.067
1977	946.086
1978	883.747
1979	891.081
1980	1287.117
1981	1917.841
1982	1870.17
1983	1954.511
1984	2002.182
1985	2002.182
1986	1719.823
1987	1609.813
1988	1386.126
1989	1378.792
1990	1356.79
1991	1151.438
1992	810.407
1993	671.061
1994	682.062
1995	722.399
1996	546.383
1997	421.705
1998	348.365
1999	359.366
2000	513.38
2001	546.383
2002	498.712
2003	509.713
2004	487.711
2005	553.717
2006	550.05
2007	649.059
2008	590.387
2009	546.383
2010	550.05
2011	513.38
2012	465.709
2013	476.71
2014	546.383
2015	502.379
2016	443.707