Year	kt
1990	2163533.1
1991	2136444.3
1992	2030810.7
1993	1880244.5
1994	1685046.3
1995	1635484.8
1996	1601176.5
1997	1489506.5
1998	1487965
1999	1523721.3
2000	1563845.6
2001	1567172
2002	1565334.4
2003	1609996.7
2004	1600978.5
2005	1611982.1
2006	1654851
2007	1658148.6
2008	1655191.1
2009	1546666.4
2010	1617827.5
2011	1699083.2
2012	1675755.9
2013	1632679.7
2014	1611960.7
2015	1592559.4
2016	1571517.3
2017	1594550.3
2018	1661000
2019	1703588.7
2020	1618271