Year	Tonnes
1830	18.335
1831	22.002
1832	14.668
1833	18.335
1850	113.677
1855	344.698
1858	484.044
1859	513.38
1860	678.395
1861	861.745
1862	777.404
1863	814.074
1864	913.083
1865	872.746
1866	2757.584
1867	3164.621
1868	2632.906
1869	3571.658
1870	3876.019
1871	5232.809
1872	5372.155
1873	5042.125
1874	6120.223
1875	7044.307
1876	8745.795
1877	8925.478
1878	11664.727
1879	11969.088
1880	14040.943
1881	14789.011
1882	15577.416
1883	17729.945
1884	18001.303
1885	19607.449
1886	20109.828
1887	21279.601
1888	22196.351
1889	23971.179
1890	27146.801
1891	29889.717
1892	31638.876
1893	37084.371
1894	37770.1
1895	43398.945
1896	44180.016
1897	51081.31
1898	57289.541
1899	66460.708
1900	75287.177
1901	77293.026
1902	74652.786
1903	73024.638
1904	81246.052
1905	72522.259
1906	82720.186
1907	92654.089
1908	93222.474
1909	98407.612
1910	96508.106
1911	100057.762
1912	113343.303
1913	123126.859
1914	111124.768
1915	101997.605
1916	108711.882
1917	100050.428
1918	39900.627
1919	34081.098
1920	31077.825
1921	33703.397
1922	41103.403
1923	45404.794
1924	54095.584
1925	53391.52
1926	77359.032
1927	96178.076
1928	106849.046
1929	115070.46
1930	156437.887
1931	187937.417
1932	211743.581
1933	236638.844
1934	286242.353
1935	324008.786
1936	371536.773
1937	379912.201
1938	400979.116
1939	405896.563
1940	486618.234
1941	427513.528
1942	294218.078
1943	375585.141
1944	351753.308
1945	372409.519
1946	418529.378
1947	503981.479
1948	536295.083
1949	609638.75
1950	679553.772
1951	736494.948
1952	788683.692
1953	834396.514
1954	911308.172
1955	1033349.599
1956	1132970.988
1957	1239831.035
1958	1323379.963
1959	1391373.477
1960	1448637.349
1961	1493932.133
1962	1567950.528
1963	1681524.852
1964	1788304.225
1965	1897052.777
1966	2003392.11
1967	2094843.423
1968	2153698.773
1969	2242938.885
1970	2359142.448
1971	2503944.944
1972	2634955.853
1973	2746751.682
1974	2851891.906
1975	2998311.549
1976	3113979.73
1977	3220146.714
1978	3330904.782
1979	3358623.635
1980	3491017.003
1981	3425062.341
1982	3489821.561
1983	3539850.442
1984	3571709.338
1985	3851989.149
1986	3862509.772
1987	4025232.897
1988	4135851.619
1989	4049222.411
1990	3796525.774
1991	3659317.635