Year	Tonnes
1857	0
1858	3.667
1859	3.667
1860	3.667
1861	7.334
1862	11.001
1863	11.001
1864	14.668
1865	14.668
1866	18.335
1867	22.002
1868	25.669
1869	25.669
1870	36.67
1871	40.337
1872	40.337
1873	44.004
1874	44.004
1875	47.671
1876	47.671
1877	47.671
1878	47.671
1879	47.671
1880	47.671
1881	51.338
1882	223.687
1883	407.037
1884	473.043
1885	451.041
1886	484.044
1887	528.048
1888	630.724
1889	645.392
1890	806.74
1891	1118.435
1892	1052.429
1893	1136.77
1894	1041.428
1895	1078.098
1896	1118.435
1897	1298.118
1898	1712.489
1899	1613.48
1900	1239.446
1901	1595.145
1902	1591.478
1903	1848.168
1904	2189.199
1905	2662.242
1906	3600.994
1907	4561.748
1908	4389.399
1909	4862.442
1910	4822.105
1911	5779.192
1912	6017.547
1913	6996.636
1914	5790.193
1915	5148.468
1916	2999.606
1917	2515.562
1918	3190.29
1919	4668.091
1920	5489.499
1921	5922.205
1922	7146.983
1923	8481.771
1924	10014.577
1925	11719.732
1926	14513.986
1927	16138.467
1928	18287.329
1929	20509.531
1930	23263.448
1931	25870.685
1932	27381.489
1933	27333.818
1934	31686.547
1935	31558.202
1936	33182.683
1937	28488.923
1938	26736.097
1939	25210.625
1940	23967.512
1941	22566.718
1942	23692.487
1943	22126.678
1944	15071.37
1945	18921.72
1946	17480.589
1947	16362.154
1948	23395.46
1949	23135.103
1950	19435.1
1951	22526.381
1952	26659.09
1953	30659.787
1954	33538.382
1955	36820.347
1956	40821.044
1957	45976.846
1958	49845.531
1959	50696.275
1960	53450.192
1961	55775.07
1962	63879.14
1963	69529.987
1964	72115.222
1965	78723.156
1966	84183.319
1967	92129.708
1968	100189.774
1969	111649.149
1970	120112.585
1971	125829.438
1972	132422.704
1973	144960.177
1974	150944.721
1975	162257.416
1976	174765.553
1977	178399.55
1978	193903.626
1979	196074.49
1980	196617.206
1981	198153.679
1982	195773.796
1983	200562.898
1984	189272.205
1985	194343.666
1986	202147.042
1987	212165.286
1988	212777.675
1989	214141.799
1990	174087.158
1991	140288.419
1992	128645.694
1993	125297.723
1994	119140.83
1995	126049.458
1996	125407.733
1997	112624.571
1998	99830.408
1999	89742.491
2000	90681.243
2001	96632.784
2002	97237.839
2003	101062.52
2004	96904.142
2005	96456.768
2006	103350.728
2007	102224.959
2008	96365.093
2009	81576.082
2010	79412.552
2011	84880.049
2012	81722.762
2013	70945.449
2014	70003.03