Year	kt
1990	4844517.4
1991	4807496.5
1992	4879626.1
1993	4995209.5
1994	5066803
1995	5117036.9
1996	5273486.3
1997	5543349.4
1998	5590536.3
1999	5609017.3
2000	5775807.2
2001	5748261.8
2002	5593024.4
2003	5658992
2004	5738286
2005	5753493.2
2006	5653081
2007	5736319.3
2008	5558378.9
2009	5156424.9
2010	5392109.4
2011	5173591.2
2012	4956053
2013	5092097.2
2014	5107208.6
2015	4990703.7
2016	4894499.2
2017	4819365.1
2018	4975300.4
2019	4817710.4
2020	4320532.5