Year	kt
1992	9057.49
1993	9446.192
1994	9812.892
1995	11037.67
1996	10520.623
1997	11771.07
1998	13175.531
1999	12838.167
2000	11246.689
2001	11639.058
2002	12145.104
2003	13303.876
2004	12291.784
2005	12797.83
2006	13054.52
2007	13234.203
2008	12357.79
2009	12233.112
2010	10322.605
2011	10010.91
2012	8991.484
2013	8595.448
2014	8591.781
2015	9024.487
2016	8896.142