Year	Tonnes
1930	40.337
1931	40.337
1932	51.338
1933	66.006
1934	69.673
1935	91.675
1936	77.007
1937	80.674
1938	47.671
1939	55.005
1940	73.34
1941	58.672
1942	110.01
1943	84.341
1944	88.008
1945	73.34
1946	132.012
1947	165.015
1948	80.674
1949	121.011
1950	1672.152
1951	2922.599
1952	3663.333
1953	4044.701
1954	4330.727
1955	4822.105
1956	4800.103
1957	5177.804
1958	5544.504
1959	5610.51
1960	6468.588
1961	7069.976
1962	7942.722
1963	8210.413
1964	9149.165
1965	12944.51
1966	13597.236
1967	13542.231
1968	13809.922
1969	14818.347
1970	16578.507
1971	16248.477
1972	16934.206
1973	19310.422
1974	19446.101
1975	19647.786
1976	19611.116
1977	19893.475
1978	21176.925
1979	21019.244
1980	21147.589
1981	21213.595
1982	24081.189
1983	23938.176
1984	23743.825
1985	24869.594
1986	26626.087
1987	27385.156
1988	30051.065
1989	31756.22
1990	36295.966
1991	36754.341
1992	42790.223
1993	45074.764
1994	48400.733
1995	51099.645
1996	53098.16
1997	55881.413
1998	57095.19
1999	55694.396
2000	60259.811
2001	63596.781
2002	59812.437
2003	62889.05
2004	59020.365
2005	56952.177
2006	62471.012
2007	63072.4
2008	68264.872
2009	64469.527
2010	68880.928
2011	69130.284
2012	75529.199
2013	67069.43
2014	64601.539