Year	kt
1990	3179
1991	1737.9
1992	1482.42
1993	1896.19
1994	2208.23
1995	2110.94
1996	2271.34
1997	2269.97
1998	2275.74
1999	2098.08
2000	1634.93
2001	1565.44
2002	1650.2
2003	1998.6
2004	1939.7
2005	2208.7
2006	2282.8
2007	2472.8
2008	2553.3
2009	2502.8
2010	2653.9
2011	3016.9
2012	2827.3
2013	3959.5
2014	5136.1
2015	3231.4
2016	2421.14
2017	2845
2018	2813.9
2019	3031.2
2020	3025.6