Year	Tonnes
1992	55.005
1993	62.339
1994	66.006
1995	66.006
1996	66.006
1997	66.006
1998	69.673
1999	66.006
2000	77.007
2001	80.674
2002	84.341
2003	84.341
2004	88.008
2005	84.341
2006	91.675
2007	99.009
2008	99.009
2009	102.676
2010	102.676
2011	102.676
2012	102.676
2013	102.676
2014	102.676