Year	Tonnes
1860	36.67
1861	73.34
1862	73.34
1863	77.007
1864	47.671
1865	62.339
1866	69.673
1867	62.339
1868	88.008
1869	69.673
1870	91.675
1871	113.677
1872	91.675
1873	88.008
1874	124.678
1875	84.341
1876	95.342
1877	113.677
1878	128.345
1879	77.007
1880	99.009
1881	99.009
1882	121.011
1883	117.344
1884	143.013
1885	220.02
1886	128.345
1887	128.345
1888	121.011
1889	161.348
1890	209.019
1891	220.02
1892	194.351
1893	194.351
1894	220.02
1895	234.688
1896	297.027
1897	517.047
1898	487.711
1899	737.067
1900	601.388
1901	421.705
1902	399.703
1903	513.38
1904	528.048
1905	586.72
1906	616.056
1907	887.414
1908	1408.128
1909	1283.45
1910	1063.43
1911	1316.453
1912	1485.135
1913	1664.818
1914	689.396
1915	106.343
1916	179.683
1917	121.011
1918	73.34
1919	238.355
1920	275.025
1921	282.359
1922	711.398
1923	1477.801
1924	1745.492
1925	1712.489
1926	1598.812
1927	2852.926
1928	3131.618
1929	3355.305
1930	2651.241
1931	3014.274
1932	3025.275
1933	3226.96
1934	3956.693
1935	3520.32
1936	4968.785
1937	6787.617
1938	5702.185
1939	4877.11
1940	2317.544
1941	3248.962
1942	2812.589
1943	3949.359
1944	2728.248
1945	641.725
1946	3285.632
1947	5456.496
1948	8467.103
1949	4939.449
1950	6552.929
1951	7986.726
1952	8665.121
1953	7576.022
1954	9163.833
1955	10938.661
1956	12181.774
1957	12255.114
1958	10619.632
1959	13571.567
1960	15104.373
1961	14939.358
1962	16809.528
1963	19358.093
1964	22852.744
1965	25327.969
1966	29519.35
1967	28617.268
1968	33314.695
1969	37935.115
1970	40395.672
1971	40582.689
1972	44161.681
1973	49387.156
1974	46680.91
1975	46101.524
1976	51279.328
1977	50219.565
1978	51913.719
1979	54333.939
1980	58246.628
1981	51510.349
1982	43083.583
1983	41576.446
1984	42254.841
1985	49665.848
1986	53329.181
1987	57656.241
1988	52185.077
1989	52584.78
1990	51745.037
1991	53699.548
1992	47472.982
1993	50402.915
1994	57223.535
1995	52713.125
1996	61282.904
1997	59933.448
1998	56988.847
1999	55423.038
2000	52427.099
2001	57051.186
2002	61682.607
2003	69130.284
2004	67091.432
2005	54645.634
2006	66200.351
2007	63985.483
2008	56519.471
2009	53149.498
2010	62082.31
2011	56816.498
2012	49134.133
2013	47219.959
2014	47300.633