Year	Tonnes
1867	168.682
1868	84.341
1869	194.351
1870	201.685
1871	297.027
1872	176.016
1873	194.351
1874	150.347
1875	165.015
1879	3.667
1883	3.667
1888	3.667
1892	370.367
1893	326.363
1894	333.697
1895	311.695
1896	374.034
1897	363.033
1898	462.042
1899	242.022
1900	418.038
1901	418.038
1902	333.697
1903	399.703
1904	355.699
1905	278.692
1906	260.357
1907	429.039
1908	729.733
1909	561.051
1910	718.732
1911	905.749
1913	1338.455
1914	11.001
1915	22.002
1916	66.006
1917	91.675
1918	124.678
1919	106.343
1920	678.395
1921	744.401
1922	678.395
1923	920.417
1924	1298.118
1925	1980.18
1926	1822.499
1927	2317.544
1928	2376.216
1929	2706.246
1930	2856.593
1931	2731.915
1932	2684.244
1933	2302.876
1934	2834.591
1935	2915.265
1936	3369.973
1937	3589.993
1938	2845.592
1939	253.023
1940	238.355
1941	135.679
1942	227.354
1943	212.686
1944	110.01
1945	66.006
1946	124.678
1947	168.682
1948	1353.123
1949	1642.816
1950	4132.709
1951	4580.083
1952	4803.77
1953	4891.778
1954	5089.796
1955	5962.542
1956	6296.239
1957	6824.287
1958	7458.678
1959	8133.406
1960	9405.855
1961	9823.893
1962	10164.924
1963	12258.781
1964	13223.202
1965	17025.881
1966	18650.362
1967	19534.109
1968	22321.029
1969	25474.649
1970	24165.53
1971	27814.195
1972	31572.87
1973	37256.72
1974	36218.959
1975	38873.867
1976	42911.234
1977	46999.939
1978	48081.704
1979	51293.996
1980	51429.675
1981	50721.944
1982	52148.407
1983	55544.049
1984	57054.853
1985	60600.842
1986	59130.375
1987	63472.103
1988	67989.847
1989	74183.41
1990	74278.752
1991	74062.399
1992	75499.863
1993	75712.549
1994	77909.082
1995	78781.828
1996	80241.294
1997	83717.61
1998	87751.31
1999	86636.542
2000	91616.328
2001	93805.527
2002	93669.848
2003	95738.036
2004	97149.831
2005	98675.303
2006	97285.51
2007	98246.264
2008	95965.39
2009	91942.691
2010	83856.956
2011	79841.591
2012	80043.276
2013	69482.316
2014	67318.786