Year	kt
1990	350214.6
1991	351624.9
1992	343368.4
1993	344016.4
1994	339752.2
1995	340003.8
1996	355320.2
1997	344627
1998	318414.1
1999	308978.1
2000	295774.4
2001	293627.4
2002	287320.3
2003	297730.8
2004	301854
2005	301353
2006	314093
2007	313375.4
2008	308325.3
2009	297260.3
2010	313739.1
2011	310593.6
2012	303351.4
2013	298304.4
2014	285730
2015	289077.4
2016	299802.4
2017	312769.9
2018	311754.9
2019	294948.3
2020	279223.8