Year	kt
1990	735.12
1991	707.099
1992	684.23
1993	643.12
1994	633.1
1995	598.29
1996	575.2
1997	546.7
1998	518.3
1999	498.6
2000	486.6
2001	509.5
2002	571
2003	577.5
2004	577.5
2005	580.6
2006	581.6
2007	623.6
2008	618.7
2009	614.4
2010	631.2
2011	632.5
2012	625.7
2013	649.4
2014	645.9
2015	646.2
2016	654.4
2017	654.9
2018	656.1
2019	655.7
2020	660.4