Year Tonnes
1830 0.11502
1831 0.13803
1832 0.09202
1833 0.11502
1850 0.71314
1855 2.16242
1858 3.03659
1859 3.22062
1860 4.25582
1861 5.40605
1862 4.87694
1863 5.10699
1864 5.72811
1865 5.47506
1866 17.29935
1867 19.85284
1868 16.5172
1869 22.40634
1870 24.31571
1871 32.82736
1872 33.70152
1873 31.63112
1874 38.39443
1875 44.19156
1876 54.86562
1877 55.99284
1878 73.17717
1879 75.08654
1880 88.08405
1881 92.77696
1882 97.72292
1883 111.22653
1884 112.92886
1885 123.00481
1886 126.15642
1887 133.49484
1888 139.24596
1889 150.38011
1890 170.30197
1891 187.5093
1892 198.48243
1893 232.64404
1894 236.94587
1895 272.25771
1896 277.15766
1897 320.45204
1898 359.39858
1899 416.93272
1900 472.30444
1901 484.88787
1902 468.32467
1903 458.11069
1904 509.68667
1905 454.95908
1906 518.93446
1907 581.25353
1908 584.81922
1909 617.34752
1910 605.43121
1911 627.69952
1912 711.04465
1913 772.42054
1914 697.12696
1915 639.86888
1916 681.99003
1917 627.65351
1918 250.31146
1919 213.80339
1920 194.96274
1921 211.43393
1922 257.85692
1923 284.84114
1924 339.3617
1925 334.94484
1926 485.30195
1927 603.36081
1928 670.30377
1929 721.87975
1930 981.39299
1931 1179.00125
1932 1328.34616
1933 1484.5234
1934 1795.70464
1935 2032.62751
1936 2330.78823
1937 2383.3304
1938 2515.49099
1939 2546.33996
1940 3052.737
1941 2681.95121
1942 1845.73933
1943 2356.18515
1944 2206.6792
1945 2336.26329
1946 2625.5903
1947 3161.66308
1948 3364.37833
1949 3824.4904
1950 4263.09332
1951 4620.30647
1952 4947.70585
1953 5234.47937
1954 5716.97478
1955 6482.586
1956 7107.54799
1957 7777.92077
1958 8302.05424
1959 8728.60282
1960 9087.84036
1961 9371.99137
1962 9836.33627
1963 10548.8302
1964 11218.69689
1965 11900.91696
1966 12568.02311
1967 13141.73118
1968 13510.95266
1969 14070.78904
1970 14799.77717
1971 15708.17703
1972 16530.05714
1973 17231.39392
1974 17890.97761
1975 18809.52244
1976 19535.15192
1977 20201.17685
1978 20896.00337
1979 21069.89403
1980 21900.44683
1981 21486.68872
1982 21892.94737
1983 22206.79713
1984 22406.65983
1985 24164.95922
1986 24230.959
1987 25251.78163
1988 25945.73397
1989 25402.27676
1990 23817.01686
1991 22956.25923
1992 20971.573
1993 15628.754
1994 12090.099
1995 11191.684
1996 11521.714
1997 7099.312
1998 6270.57
1999 4503.076
2000 3512.986
2001 3714.671
2002 3986.029
2003 4290.39
2004 4554.414
2005 4895.445
2006 4994.454
2007 4679.092
2008 4778.101
2009 4550.747
2010 4932.115
2011 5038.458
2012 4924.781
2013 4998.121
2014 4932.115