Year Tonnes
1858 146.68
1859 205.352
1860 304.361
1861 425.372
1862 469.376
1863 469.376
1864 572.052
1865 696.73
1866 689.396
1867 674.728
1868 770.07
1869 744.401
1870 898.415
1871 1111.101
1872 1276.116
1873 1239.446
1874 1169.773
1875 1279.783
1876 1496.136
1877 1419.129
1878 1356.79
1879 1448.465
1880 1672.152
1881 1565.809
1882 1730.824
1883 1914.174
1884 1965.512
1885 2046.186
1886 2086.523
1887 2258.872
1888 2306.543
1889 2544.898
1890 2878.595
1891 3523.987
1892 3472.649
1893 2878.595
1894 3586.326
1895 3850.35
1896 4213.383
1897 4444.404
1898 4752.432
1899 5126.466
1900 5680.183
1901 5188.805
1902 5240.143
1903 5676.516
1904 5966.209
1905 6244.901
1906 6901.294
1907 8005.061
1908 8012.395
1909 8074.734
1910 7796.042
1911 8617.45
1912 8767.797
1913 9259.175
1914 8434.1
1915 8932.812
1916 8489.105
1917 6112.889
1918 5749.856
1919 4609.419
1920 7238.658
1921 4470.073
1922 6156.893
1923 7671.364
1924 7238.658
1925 7543.019
1926 7462.345
1927 8602.782
1928 8973.149
1929 10274.934
1930 9567.203
1931 10106.252
1932 10234.597
1933 9574.537
1934 9563.536
1935 9482.862
1936 9930.236
1937 10472.952
1938 10469.285
1939 11870.079
1940 8320.423
1941 6633.603
1942 5845.198
1943 6178.895
1944 4455.405
1945 1624.481
1946 5771.858
1947 9457.193
1948 10223.596
1949 8540.443
1950 10245.598
1951 12313.786
1952 11239.355
1953 10348.274
1954 12610.813
1955 13633.906
1956 17080.886
1957 17715.277
1958 16303.482
1959 16622.511
1960 19523.108
1961 20388.52
1962 24154.529
1963 29104.979
1964 28166.227
1965 30370.094
1966 31528.866
1967 32562.96
1968 36028.275
1969 38096.463
1970 40296.663
1971 41943.146
1972 42973.573
1973 46262.872
1974 41481.104
1975 39097.554
1976 40483.68
1977 41085.068
1978 42218.171
1979 39911.628
1980 40538.685
1981 38859.199
1982 36629.663
1983 40069.309
1984 39174.561
1985 39827.287
1986 42295.178
1987 40252.659
1988 40711.034
1989 39467.921
1990 42610.54
1991 42705.882
1992 42793.89
1993 40751.371
1994 41323.423
1995 39225.899
1996 39885.959
1997 41466.436
1998 41704.791
1999 40692.699
2000 39049.883
2001 42944.237
2002 40696.366
2003 40175.652
2004 40366.336
2005 41338.091
2006 41851.471
2007 37986.453
2008 40403.006
2009 41646.119
2010 38994.878
2011 36967.027
2012 37773.767
2013 40226.99
2014 35305.876