Year	Tonnes
1950	25.669
1951	25.669
1952	44.004
1953	29.336
1954	33.003
1955	40.337
1956	40.337
1957	47.671
1958	47.671
1959	55.005
1960	66.006
1961	91.675
1962	88.008
1963	106.343
1964	132.012
1965	132.012
1966	179.683
1967	198.018
1968	194.351
1969	242.022
1970	275.025
1971	315.362
1972	399.703
1973	403.37
1974	377.701
1975	311.695
1976	322.696
1977	462.042
1978	355.699
1979	1382.459
1980	718.732
1981	627.057
1982	733.4
1983	546.383
1984	608.722
1985	550.05
1986	707.731
1987	766.403
1988	792.072
1989	836.076
1990	773.737
1991	843.41
1992	836.076
1993	865.412
1994	832.409
1995	953.42
1996	1059.763
1997	986.423
1998	1166.106
1999	1536.473
2000	1360.457
2001	1162.439
2002	1232.112
2003	1463.133
2004	1397.127
2005	1338.455
2006	1221.111
2007	1408.128
2008	1683.153
2009	2783.253
2010	2640.24
2011	2464.224
2012	2486.226
2013	2658.575
2014	2621.905