Year	Tonnes
1908	0
1909	25.669
1910	66.006
1911	124.678
1912	198.018
1913	223.687
1914	289.693
1915	333.697
1916	414.371
1917	528.048
1918	770.07
1919	649.059
1920	869.079
1921	1001.091
1922	982.756
1923	1210.11
1924	1657.484
1925	1947.177
1926	1961.845
1927	2101.191
1928	3234.294
1929	3597.327
1930	3648.665
1931	3076.613
1932	3256.296
1933	4070.37
1934	4781.768
1935	5093.463
1936	5746.189
1937	7253.326
1938	8346.092
1939	9460.86
1940	10744.31
1941	9908.234
1942	10674.637
1943	10282.268
1944	10780.98
1945	11030.336
1946	10945.995
1947	12013.092
1948	12651.15
1949	13762.251
1950	2354.214
1951	2515.562
1952	2797.921
1953	2937.267
1954	2838.258
1955	2724.581
1956	2882.262
1957	2566.9
1958	3479.983
1959	3094.948
1960	2581.568
1961	4602.085
1962	7238.658
1963	1309.119
1964	3795.345
1965	5196.139
1966	4055.702
1967	4638.755
1968	4041.034
1969	3905.355
1970	8998.818
1971	8104.07
1972	8243.416
1973	9398.521
1974	10051.247
1975	9622.208
1976	15925.781
1977	16175.137
1978	15328.06
1979	16725.187
1980	16937.873
1981	17260.569
1982	18426.675
1983	16303.482
1984	17535.594
1985	20755.22
1986	17385.247
1987	17520.926
1988	15867.109
1989	16142.134
1990	17025.881
1991	17014.88
1992	19152.741
1993	17971.967
1994	17440.252
1995	17022.214
1996	20590.205
1997	18393.672
1998	19123.405
1999	22544.716
2000	23839.167
2001	26354.729
2002	28620.935
2003	31987.241
2004	33432.039
2005	38151.468
2006	42676.546
2007	45474.467
2008	44385.368
2009	44895.081
2010	47935.024
2011	46933.933
2012	45419.462
2013	46541.564
2014	46273.873