Year	kt
1990	0
1991	1015.759
1992	1122.102
1993	1151.438
1994	1309.119
1995	1576.81
1996	1686.82
1997	1741.825
1998	1789.496
1999	1650.15
2000	1631.815
2001	2009.516
2002	1756.493
2003	1855.502
2004	1958.178
2005	2255.205
2006	2159.863
2007	2203.867
2008	2478.892
2009	2669.576
2010	2819.923
2011	2566.9
2012	2856.593
2013	2192.866
2014	3311.301
2015	3516.653
2016	3689.002