Year	kt
1990	87745.4
1991	89369.5
1992	90903.6
1993	92661.9
1994	87900.8
1995	93722.3
1996	98940.1
1997	106057.6
1998	110982.4
1999	116535.3
2000	114614.4
2001	126704.4
2002	129441.2
2003	133020.4
2004	144503.9
2005	162217.1
2006	170745
2007	183395.7
2008	189935.2
2009	197660.5
2010	200313.3
2011	205767.3
2012	215000.9
2013	213856.4
2014	219121.1
2015	226283.6
2016	235425.8
2017	244540.5
2018	237983
2019	217908.3
2020	210752.3