Year	kt
1992	9508.531
1993	6391.581
1994	3380.974
1995	3054.611
1996	2812.589
1997	2570.567
1998	2126.86
1999	1419.129
2000	1283.45
2001	1433.797
2002	1631.815
2003	1767.494
2004	1910.507
2005	1921.508
2006	1870.17
2007	1932.509
2008	2035.185
2009	1976.513
2010	2174.531
2011	2269.873
2012	2086.523
2013	2148.862
2014	2178.198
2015	2291.875
2016	2464.224