Year	kt
1960	1298.118
1961	1191.775
1962	1345.789
1963	1609.813
1964	1532.806
1965	1631.815
1966	1298.118
1967	1419.129
1968	1587.811
1969	1441.131
1970	2321.211
1971	2016.85
1972	2203.867
1973	2229.536
1974	2669.576
1975	2398.218
1976	2079.189
1977	2691.578
1978	2713.58
1979	2519.229
1980	2405.552
1981	2841.925
1982	2893.263
1983	3505.652
1984	2460.557
1985	3142.619
1986	2933.6
1987	3142.619
1988	3204.958
1989	3054.611
1990	3509.319
1991	3894.354
1992	3237.961
1993	3813.68
1994	4536.079
1995	4620.42
1996	4855.108
1997	5511.501
1998	5588.508
1999	5617.844
2000	5317.15
2001	5973.543
2002	6475.922
2003	6684.941
2004	6402.582
2005	6094.554
2006	8459.769
2007	8929.145
2008	8239.749
2009	6802.285
2010	8096.736
2011	8690.79
2012	11763.736
2013	11837.076
2014	11741.734
2015	12200.109
2016	13256.205