Year	kt
1990	119307.5
1991	112936.2
1992	99712.1
1993	91419.3
1994	83612.6
1995	78242.3
1996	68660.5
1997	66037.9
1998	60918.6
1999	66615.4
2000	71822.9
2001	74385.1
2002	71198
2003	72738.2
2004	74323.7
2005	77678.2
2006	78937.1
2007	65633.8
2008	72831.5
2009	55256.9
2010	51689.8
2011	37098.9
2012	38483.4
2013	27629.1
2014	31223.3
2015	25101.5
2016	28127.7
2017	54286
2018	50121.3
2019	55548.4
2020	52437.2