Year	Tonnes
1884	3.667
1885	3.667
1886	7.334
1887	7.334
1888	7.334
1889	7.334
1890	11.001
1891	47.671
1892	66.006
1893	47.671
1894	40.337
1895	40.337
1896	40.337
1897	40.337
1898	88.008
1899	161.348
1900	245.689
1901	238.355
1902	99.009
1903	212.686
1904	278.692
1905	352.032
1906	429.039
1907	799.406
1908	1213.777
1909	1510.804
1910	1331.121
1911	1507.137
1912	1459.466
1913	1573.143
1914	1543.807
1915	1888.505
1916	1965.512
1917	2005.849
1918	1947.177
1919	1983.847
1920	2148.862
1921	2449.556
1922	2955.602
1923	2981.271
1924	3619.329
1925	4789.102
1926	4737.764
1927	4686.426
1928	5383.156
1929	7088.311
1930	5628.845
1931	4503.076
1932	4110.707
1933	6666.606
1934	6754.614
1935	7172.652
1936	7411.007
1937	8808.134
1938	8012.395
1939	5856.199
1940	5302.482
1941	5254.811
1942	6046.883
1943	6582.265
1944	6461.254
1945	6274.237
1946	5771.858
1947	5914.871
1948	6391.581
1949	6637.27
1950	4547.08
1951	4778.101
1952	5192.472
1953	5518.835
1954	6241.234
1955	6131.224
1956	6318.241
1957	6681.274
1958	7381.671
1959	7223.99
1960	8173.743
1961	8643.119
1962	9970.573
1963	10234.597
1964	12266.115
1965	11965.421
1966	13256.205
1967	13655.908
1968	14502.985
1969	15302.391
1970	17784.95
1971	18613.692
1972	18173.652
1973	19757.796
1974	21360.275
1975	21965.33
1976	22442.04
1977	23340.455
1978	22460.375
1979	22273.358
1980	24121.526
1981	24103.191
1982	23670.485
1983	20450.859
1984	20692.881
1985	19512.107
1986	21847.986
1987	25782.677
1988	25107.949
1989	21840.652
1990	21070.582
1991	20293.178
1992	20425.19
1993	23615.48
1994	23289.117
1995	23883.171
1996	24389.217
1997	27476.831
1998	27806.861
1999	29358.002
2000	30296.754
2001	27165.136
2002	27187.138
2003	26380.398
2004	31895.566
2005	37135.709
2006	34876.837
2007	42955.238
2008	41015.395
2009	51704.7
2010	57593.902
2011	49632.845
2012	55071.006
2013	57153.862
2014	61744.946