Year	Tonnes
1851	0
1852	0
1853	0
1854	0
1855	0
1856	0
1857	0
1858	0
1859	0
1860	278.692
1861	509.713
1862	355.699
1863	399.703
1864	267.691
1865	421.705
1866	696.73
1867	894.748
1868	733.4
1869	641.725
1870	601.388
1871	693.063
1872	707.731
1873	869.079
1874	891.081
1875	828.742
1876	931.418
1877	1067.097
1878	968.088
1879	1455.799
1880	2207.534
1881	1767.494
1882	2013.183
1883	2427.554
1884	2574.234
1885	2907.931
1886	2889.596
1887	3036.276
1888	3531.321
1889	3428.645
1890	3549.656
1891	4011.698
1892	4154.711
1893	3967.694
1894	4363.73
1895	4594.751
1896	4506.743
1897	4979.786
1898	5617.844
1899	5790.193
1900	10175.925
1901	11448.374
1902	11404.37
1903	11228.354
1904	11554.717
1905	12057.096
1906	14370.973
1907	15489.408
1908	16769.191
1909	14565.324
1910	17451.253
1911	19255.417
1912	20802.891
1913	22409.037
1914	24499.227
1915	21811.316
1916	19288.42
1917	20777.222
1918	22959.087
1919	21756.311
1920	25753.341
1921	23171.773
1922	24363.548
1923	24869.594
1924	27091.796
1925	28257.902
1926	27876.534
1927	28917.962
1928	26310.725
1929	23674.152
1930	22049.671
1931	19563.445
1932	20359.184
1933	21598.63
1934	22717.065
1935	25250.962
1936	27073.461
1937	28881.292
1938	28059.884
1939	32170.591
1940	29064.642
1941	34576.143
1942	36534.321
1943	35019.85
1944	34238.779
1945	32724.308
1946	35452.556
1947	38048.792
1948	38455.829
1949	37682.092
1950	54788.647
1951	59082.704
1952	60256.144
1953	59489.741
1954	67901.839
1955	70740.097
1956	73097.978
1957	74586.78
1958	77681.728
1959	83787.283
1960	88202.351
1961	90589.568
1962	94912.961
1963	101029.517
1964	108979.573
1965	120966.996
1966	120332.605
1967	129265.417
1968	134622.904
1969	142257.598
1970	147618.752
1971	152774.554
1972	157486.649
1973	170992.21
1974	172356.334
1975	175883.988
1976	174244.839
1977	187787.07
1978	202015.03
1979	205069.641
1980	220746.066
1981	230360.94
1982	234119.615
1983	225003.453
1984	236594.84
1985	241229.928
1986	239964.813
1987	256106.947
1988	261145.405
1989	277771.583
1990	263704.971
1991	261471.768
1992	267984.36
1993	277397.549
1994	278119.948
1995	281860.288
1996	302164.467
1997	305794.797
1998	316883.805
1999	325343.574
2000	329443.28
2001	324844.862
2002	341353.696
2003	336271.234
2004	342699.485
2005	350172.831
2006	365346.877
2007	372090.49
2008	385904.079
2009	394792.887
2010	390861.863
2011	391818.95
2012	388126.281
2013	372266.506
2014	361261.839