Year	kt
1990	153149.3
1991	139757.1
1992	136842.4
1993	130982.2
1994	125199.7
1995	124519
1996	128483.7
1997	126005.8
1998	119767.3
1999	112359.9
2000	124716.7
2001	124341.3
2002	120209.9
2003	123372.9
2004	123786
2005	121893.6
2006	122553.6
2007	124432.8
2008	118718.3
2009	113246.1
2010	114167.6
2011	111220.1
2012	107320.2
2013	102910.3
2014	99960.6
2015	101167.5
2016	102998
2017	103549.9
2018	102734.3
2019	97712.9
2020	88835.2