Year	kt
1990	62936.9
1991	66428.5
1992	66844.6
1993	72219.1
1994	73606.2
1995	76440.2
1996	76123.8
1997	74433.2
1998	74649.1
1999	77505.3
2000	80046.8
2001	78645.5
2002	82404.3
2003	88188.9
2004	89492.7
2005	94187.8
2006	99808.7
2007	102750.2
2008	107745.5
2009	112172.2
2010	114179.4
2011	120784.9
2012	134934.2
2013	139024.1
2014	147735.2
2015	156273
2016	154654.3
2017	157704.4
2018	164534.1
2019	170582.4
2020	161563