Year	Tonnes
1900	0
1901	0
1902	0
1903	0
1904	0
1905	0
1916	3.667
1917	7.334
1918	18.335
1919	18.335
1920	22.002
1921	25.669
1922	25.669
1923	14.668
1924	29.336
1925	33.003
1926	40.337
1927	58.672
1928	73.34
1929	80.674
1930	84.341
1931	99.009
1932	113.677
1933	121.011
1934	139.346
1935	132.012
1936	51.338
1937	69.673
1938	33.003
1939	161.348
1940	238.355
1941	311.695
1942	498.712
1943	469.376
1944	498.712
1945	616.056
1946	762.736
1947	744.401
1948	803.073
1949	909.416
1950	3788.011
1951	4136.376
1952	3894.354
1953	4004.364
1954	4158.378
1955	4613.086
1956	5001.788
1957	5544.504
1958	5221.808
1959	5665.515
1960	6160.56
1961	6065.218
1962	5669.182
1963	5427.16
1964	5650.847
1965	6596.933
1966	8430.433
1967	8441.434
1968	9061.157
1969	11276.025
1970	15075.037
1971	18668.697
1972	28349.577
1973	38312.816
1974	31906.567
1975	32031.245
1976	39170.894
1977	41891.808
1978	62529.684
1979	45621.147
1980	66519.38
1981	46438.888
1982	39269.903
1983	52625.117
1984	71103.13
1985	72786.283
1986	76277.267
1987	84120.98
1988	83948.631
1989	80046.943
1990	76970.33
1991	79049.519
1992	80138.618
1993	82210.473
1994	86416.522
1995	95294.329
1996	97098.493
1997	87340.606
1998	106999.393
1999	92045.367
2000	87861.32
2001	84219.989
2002	89907.506
2003	91575.991
2004	88510.379
2005	107278.085
2006	101069.854
2007	109404.945
2008	110208.018
2009	121399.702
2010	119177.5
2011	121187.016
2012	129987.816
2013	134465.223
2014	145400.217