Year Tonnes
1860 64.85841
1861 213.23314
1862 362.49633
1863 511.75953
1864 661.02273
1865 810.28592
1866 959.54912
1867 1107.92384
1868 1257.18704
1869 1406.45024
1870 1555.71343
1871 1704.97663
1872 1853.35135
1873 2002.61455
1874 2151.87774
1875 2301.14094
1876 3977.68648
1877 4179.36949
1878 4381.0525
1879 4708.00998
1880 4987.87847
1881 5267.74696
1882 5386.80213
1883 5753.74082
1884 5942.98523
1885 6239.73468
1886 6559.58439
1887 6890.09575
1888 7384.97432
1889 7818.54837
1890 8361.4044
1891 8668.8155
1892 8800.30927
1893 8995.77298
1894 9221.44472
1895 9570.61398
1896 9806.0589
1897 10378.23449
1898 10610.12553
1899 10885.55166
1900 10806.47771
1901 11291.58309
1902 11442.62323
1903 11657.63331
1904 11771.35765
1905 12117.8615
1906 12654.49823
1907 13299.52847
1908 13544.74658
1909 13462.11874
1910 13321.74026
1911 13490.54982
1912 14354.14403
1913 15014.27828
1914 13687.79047
1915 13657.58245
1916 14536.28067
1917 13669.13258
1918 11654.07943
1919 11009.93766
1920 10919.31357
1921 10486.628
1922 9359.15779
1923 9892.24063
1924 12141.85023
1925 11426.63075
1926 11585.66713
1927 12433.26885
1928 13090.73769
1929 14643.78571
1930 12909.48952
1931 12078.76876
1932 10527.49768
1933 9628.36462
1934 9617.70297
1935 9901.12534
1936 10757.61178
1937 13030.32163
1938 14930.76197
1939 16403.84756
1940 18488.20148
1941 18609.03359
1942 20070.56905
1943 22159.36533
1944 21127.85002
1945 11212.50914
1946 13955.22037
1947 15837.0028
1948 17116.40163
1949 17993.32291
1950 18525.51728
1951 19740.94616
1952 21107.41518
1953 21876.83142
1954 23363.24408
1955 24251.71549
1956 26023.32747
1957 27180.11724
1958 29698.0452
1959 29725.58782
1960 31703.32517
1961 34409.60907
1962 36668.99185
1963 38572.98607
1964 40143.80352
1965 39115.8421
1966 38895.50119
1967 38814.6503
1968 40609.36254
1969 43111.29801
1970 49427.44124
1971 51857.41053
1972 52341.62745
1973 52563.7453
1974 53182.1214
1975 55653.84885
1976 57829.71532
1977 59570.2308
1978 60123.74849
1979 58568.03506
1980 59266.37358
1981 58633.78194
1982 58069.6026
1983 58162.00362
1984 60131.74473
1985 59321.45881
1986 59740.81731
1987 59273.48135
1988 58332.59013
1989 56418.82273
1990 52760.09748
1991 48656.24806
1992 44183.683
1993 42881.898
1994 40421.341
1995 42115.495
1996 41312.422
1997 41048.398
1998 40480.013
1999 39240.567
2000 35885.262
2001 39357.911
2002 39251.568
2003 39493.59
2004 38749.189
2005 39357.911
2006 39104.888
2007 36780.01
2008 37711.428
2009 34037.094
2010 36240.961
2011 34524.805
2012 32764.645
2013 33091.008
2014 30678.122