Year	Tonnes
1962	40.337
1963	33.003
1964	62.339
1965	47.671
1966	77.007
1967	84.341
1968	62.339
1969	44.004
1970	40.337
1971	58.672
1972	62.339
1973	55.005
1974	62.339
1975	55.005
1976	44.004
1977	51.338
1978	58.672
1979	62.339
1980	62.339
1981	51.338
1982	51.338
1983	55.005
1984	55.005
1985	121.011
1986	58.672
1987	47.671
1988	66.006
1989	62.339
1990	66.006
1991	66.006
1992	62.339
1993	62.339
1994	62.339
1995	66.006
1996	84.341
1997	84.341
1998	80.674
1999	84.341
2000	84.341
2001	88.008
2002	84.341
2003	84.341
2004	58.672
2005	58.672
2006	47.671
2007	99.009
2008	95.342
2009	121.011
2010	121.011
2011	132.012
2012	113.677
2013	106.343
2014	154.014