Year	kt
1990	10737.46
1991	10346.53
1992	12272.25
1993	13066.22
1994	13372.03
1995	13535.88
1996	14154.98
1997	14415.78
1998	15488.92
1999	15450.88
2000	15876.5
2001	16386.32
2002	17221.48
2003	17944.11
2004	17927.3
2005	20693.7
2006	22485.4
2007	23001
2008	24762.2
2009	24717.1
2010	25965.7
2011	26017.6
2012	27174.2
2013	28853
2014	30282.7
2015	30492.4
2016	30301.1
2017	30514.9
2018	30844.4
2019	32966.8
2020	32470.2