Year	Tonnes
1891	520.714
1892	579.386
1893	531.715
1894	539.049
1895	495.045
1896	579.386
1897	689.396
1898	737.067
1899	755.402
1900	1001.091
1901	1312.786
1902	1426.463
1903	1558.475
1904	1719.823
1905	1708.822
1906	1921.508
1907	2266.206
1908	3773.343
1909	3696.336
1910	4158.378
1911	8408.431
1912	8639.452
1913	11752.735
1914	10150.256
1915	14326.969
1916	17198.23
1917	26153.044
1918	30667.121
1919	41118.071
1920	76299.269
1921	90362.214
1922	85620.783
1923	72096.887
1924	67927.508
1925	57131.86
1926	44722.732
1927	31822.226
1928	24103.191
1929	22167.015
1930	20395.854
1931	16765.524
1932	16208.14
1933	16754.523
1934	18907.052
1935	21444.616
1936	21979.998
1937	24924.599
1938	24286.541
1939	22684.062
1940	23230.445
1941	22566.718
1942	18995.06
1943	19075.734
1944	20142.831
1945	22636.391
1946	25646.998
1947	29380.004
1948	30538.776
1949	28987.635
1950	30538.776
1951	34924.508
1952	37249.386
1953	36743.34
1954	36306.967
1955	39702.609
1956	42177.834
1957	49328.484
1958	54062.581
1959	58345.637
1960	63116.404
1961	65305.603
1962	63809.467
1963	66361.699
1964	74278.752
1965	75246.84
1966	80930.69
1967	90101.857
1968	93988.877
1969	102287.298
1970	114073.036
1971	126339.151
1972	132459.374
1973	144292.783
1974	155007.757
1975	164472.284
1976	184138.405
1977	192847.53
1978	222649.239
1979	240874.229
1980	268453.736
1981	284529.864
1982	304837.71
1983	278442.644
1984	277624.903
1985	288501.225
1986	294559.109
1987	307356.939
1988	307067.246
1989	361877.895
1990	318427.612
1991	331958.842
1992	334698.091
1993	339468.858
1994	352780.068
1995	332816.92
1996	346417.823
1997	369769.279
1998	389087.035
1999	391591.596
2000	398382.88
2001	412977.54
2002	414389.335
2003	440208.682
2004	441308.782
2005	466361.726
2006	479251.231
2007	480520.013
2008	493251.837
2009	475950.931
2010	464308.206
2011	484429.035
2012	496324.783
2013	490340.239
2014	480270.657