Year Tonnes
1830 0.12148
1831 0.14577
1832 0.09718
1833 0.12148
1850 0.75317
1855 2.28379
1858 3.20703
1859 3.40139
1860 4.4947
1861 5.70948
1862 5.15068
1863 5.39364
1864 6.04962
1865 5.78237
1866 18.27034
1867 20.96716
1868 17.44429
1869 23.66398
1870 25.68052
1871 34.66991
1872 35.59315
1873 33.40654
1874 40.54946
1875 46.67197
1876 57.94516
1877 59.13564
1878 77.28451
1879 79.30105
1880 93.0281
1881 97.98441
1882 103.20798
1883 117.46953
1884 119.26741
1885 129.90891
1886 133.23742
1887 140.98774
1888 147.06165
1889 158.82075
1890 179.8608
1891 198.03395
1892 209.62298
1893 245.70204
1894 250.24533
1895 287.53918
1896 292.71415
1897 338.43859
1898 379.57115
1899 440.33461
1900 498.81427
1901 512.10399
1902 494.61112
1903 483.82384
1904 538.29472
1905 480.49534
1906 548.06158
1907 613.87853
1908 617.64436
1909 651.99843
1910 639.41327
1911 662.93147
1912 750.95466
1913 815.77549
1914 736.25579
1915 675.78388
1916 720.26924
1917 662.88288
1918 264.36111
1919 225.8039
1920 205.90575
1921 223.30144
1922 272.33009
1923 300.82891
1924 358.40963
1925 353.74486
1926 512.54132
1927 637.22666
1928 707.92704
1929 762.39792
1930 1036.4773
1931 1245.17705
1932 1402.9045
1933 1567.84776
1934 1896.4952
1935 2146.71623
1936 2461.61233
1937 2517.10362
1938 2656.68221
1939 2689.2627
1940 3224.08314
1941 2832.48563
1942 1949.33826
1943 2488.43474
1944 2330.53722
1945 2467.3947
1946 2772.96126
1947 3339.1231
1948 3553.21649
1949 4039.15405
1950 4502.37517
1951 4879.63824
1952 5225.41412
1953 5528.28386
1954 6037.86111
1955 6846.44508
1956 7506.48537
1957 8214.4853
1958 8768.0377
1959 9218.52789
1960 9597.92897
1961 9898.02901
1962 10388.43698
1963 11140.92227
1964 11848.38769
1965 12568.89989
1966 13273.44983
1967 13879.35938
1968 14269.30478
1969 14860.56405
1970 15630.46933
1971 16589.85649
1972 17457.86766
1973 18198.56955
1974 18895.17482
1975 19865.27636
1976 20631.63448
1977 21335.04253
1978 22068.86875
1979 22252.51967
1980 23129.6903
1981 22692.7085
1982 23121.76991
1983 23453.23565
1984 23664.31638
1985 25521.30682
1986 25591.01108
1987 26669.13115
1988 27402.03413
1989 26828.07338
1990 25153.83491
1991 24244.76407
1992 22148.68
1993 17495.257
1994 17359.578
1995 16204.473
1996 15731.43
1997 15339.061
1998 16197.139
1999 13692.578
2000 12163.439
2001 12885.838
2002 13142.528
2003 12823.499
2004 13245.204
2005 13901.597
2006 14158.287
2007 15166.712
2008 15009.031
2009 12519.138
2010 13468.891
2011 13787.92
2012 13831.924
2013 12640.149
2014 12838.167