Year	Tonnes
1860	29.336
1861	671.061
1862	1228.445
1863	1070.764
1864	1606.146
1865	1272.449
1866	1477.801
1867	1470.467
1868	1697.821
1869	1873.837
1870	2680.577
1871	2310.21
1872	2977.604
1873	2772.252
1874	2999.606
1875	3069.279
1876	4110.707
1877	3806.346
1878	3788.011
1879	4360.063
1880	5071.461
1881	5962.542
1882	6277.904
1883	6651.938
1884	7367.003
1885	8382.762
1886	8335.091
1887	10157.59
1888	10905.658
1889	11265.024
1890	12218.444
1891	11008.334
1892	10898.324
1893	10531.624
1894	13072.855
1895	12031.427
1896	11433.706
1897	11928.751
1898	12412.795
1899	13600.903
1900	13919.932
1901	13531.23
1902	15027.366
1903	15328.06
1904	16200.806
1905	17858.29
1906	21107.252
1907	22827.075
1908	23281.783
1909	25724.005
1910	25757.008
1911	26560.081
1912	27872.867
1913	29988.726
1914	27260.478
1915	23798.83
1916	23531.139
1917	16134.8
1918	18995.06
1919	18624.693
1920	17883.959
1921	21899.324
1922	25720.338
1923	26846.107
1924	32207.261
1925	30993.484
1926	35870.594
1927	40417.674
1928	38191.805
1929	44077.34
1930	39596.266
1931	34213.11
1932	28100.221
1933	30513.107
1934	39709.943
1935	45430.463
1936	32031.245
1937	45228.778
1938	45034.427
1939	46178.531
1940	49090.129
1941	42940.57
1942	41932.145
1943	7124.981
1944	3586.326
1945	4360.063
1946	22192.684
1947	36827.681
1948	35569.9
1949	39819.953
1950	41484.771
1951	48884.777
1952	50688.941
1953	56072.097
1954	65026.911
1955	73369.336
1956	83589.265
1957	87197.593
1958	87721.974
1959	94219.898
1960	109357.274
1961	124549.655
1962	146456.313
1963	164780.312
1964	175957.328
1965	189767.25
1966	214248.142
1967	234427.643
1968	249495.346
1969	270008.544
1970	296740.974
1971	311588.657
1972	328970.237
1973	354320.208
1974	359406.337
1975	342310.783
1976	367312.389
1977	356175.71
1978	373234.594
1979	387466.221
1980	388969.691
1981	378020.029
1982	369681.271
1983	361364.515
1984	367649.753
1985	372134.494
1986	366454.311
1987	383670.876
1988	389780.098
1989	408907.17
1990	417550.289
1991	423894.199
1992	420535.227
1993	411917.777
1994	407378.031
1995	430483.798
1996	425830.375
1997	430487.465
1998	440153.677
1999	441998.178
2000	450564.29
2001	450347.937
2002	452610.476
2003	468349.24
2004	473970.751
2005	473384.031
2006	469346.664
2007	462676.391
2008	447186.983
2009	401591.505
2010	405361.181
2011	397994.178
2012	369468.585
2013	345317.723
2014	320411.459