Year Tonnes
1846 2871.261
1847 3872.352
1848 3652.332
1849 3333.303
1850 3138.952
1851 3120.617
1852 3766.009
1853 4173.046
1854 5951.541
1855 4653.423
1856 4726.763
1857 4220.717
1858 3711.004
1859 3527.654
1860 4800.103
1861 4407.734
1862 5676.516
1863 4088.705
1864 3406.643
1865 3850.35
1866 4220.717
1867 4044.701
1868 4242.719
1869 4374.731
1870 4946.783
1871 4983.453
1872 5335.485
1873 5144.801
1874 4745.098
1875 5423.493
1876 6215.565
1877 6314.574
1878 6692.275
1879 7216.656
1880 7979.392
1881 8034.397
1882 8137.073
1883 9017.153
1884 9024.487
1885 9427.857
1886 9625.875
1887 9794.557
1888 10868.988
1889 10619.632
1890 10293.269
1891 11917.75
1892 11331.03
1893 11470.376
1894 11628.057
1895 11635.391
1896 12504.47
1897 13113.192
1898 12944.51
1899 13289.208
1900 14645.998
1901 14323.302
1902 14312.301
1903 15309.725
1904 16178.804
1905 16607.843
1906 18070.976
1907 18591.69
1908 18936.388
1909 19933.812
1910 20850.562
1911 22097.342
1912 24942.934
1913 27572.173
1914 25845.016
1915 24554.232
1916 22416.371
1917 8661.454
1918 14539.655
1919 21998.333
1920 22189.017
1921 23252.447
1922 27293.481
1923 27220.141
1924 30619.45
1925 33619.056
1926 34356.123
1927 37997.454
1928 38037.791
1929 41301.421
1930 40813.71
1931 44994.09
1932 41451.768
1933 38602.509
1934 38661.181
1935 37297.057
1936 39926.296
1937 44037.003
1938 43343.94
1939 40736.703
1940 33465.042
1941 37157.711
1942 34623.814
1943 34957.511
1944 23355.123
1945 14664.333
1946 31129.163
1947 44642.058
1948 47304.3
1949 50542.261
1950 51330.666
1951 55016.001
1952 54762.978
1953 55313.028
1954 58444.646
1955 61040.882
1956 65136.921
1957 64465.86
1958 66750.401
1959 67179.44
1960 73505.015
1961 75888.565
1962 83358.244
1963 91227.626
1964 96867.472
1965 100497.802
1966 103655.089
1967 106783.04
1968 113552.322
1969 115910.203
1970 141934.902
1971 140875.139
1972 157794.677
1973 165645.724
1974 160445.918
1975 153020.243
1976 169683.091
1977 164277.933
1978 170548.503
1979 187812.739
1980 177508.469
1981 164956.328
1982 134322.21
1983 138256.901
1984 145055.519
1985 147948.782
1986 145095.856
1987 152569.202
1988 146914.688
1989 163100.826
1990 158403.399
1991 165154.346
1992 162224.413
1993 164802.314
1994 165323.028
1995 178634.238
1996 185847.227
1997 178311.542
1998 178439.887
1999 173665.453
2000 173504.105
2001 176793.404
2002 181663.18
2003 182205.896
2004 184835.135
2005 181479.83
2006 179638.996
2007 176690.728
2008 177020.758
2009 172371.002
2010 183052.973
2011 174167.832
2012 170310.148
2013 173254.749
2014 167303.208