Year Tonnes
1830 0.03196
1831 0.03835
1832 0.02557
1833 0.03196
1850 0.19814
1855 0.60082
1858 0.8437
1859 0.89484
1860 1.18246
1861 1.50205
1862 1.35504
1863 1.41896
1864 1.59153
1865 1.52122
1866 4.80655
1867 5.51603
1868 4.58923
1869 6.22551
1870 6.75602
1871 9.12094
1872 9.36383
1873 8.78857
1874 10.66773
1875 12.27844
1876 15.24418
1877 15.55737
1878 20.33197
1879 20.86248
1880 24.47378
1881 25.77769
1882 27.1519
1883 30.90382
1884 31.37681
1885 34.17637
1886 35.05203
1887 37.09098
1888 38.6889
1889 41.78248
1890 47.31768
1891 52.09867
1892 55.1475
1893 64.63916
1894 65.83441
1895 75.64565
1896 77.00708
1897 89.03625
1898 99.85738
1899 115.84299
1900 131.22779
1901 134.72405
1902 130.12203
1903 127.28412
1904 141.61429
1905 126.40846
1906 144.18375
1907 161.49884
1908 162.48955
1909 171.5274
1910 168.2165
1911 174.40366
1912 197.56075
1913 214.61378
1914 193.69378
1915 177.78487
1916 189.48805
1917 174.39088
1918 69.54798
1919 59.40437
1920 54.16958
1921 58.74603
1922 71.64446
1923 79.14191
1924 94.29021
1925 93.06301
1926 134.8391
1927 167.64125
1928 186.24107
1929 200.57124
1930 272.6759
1931 327.58052
1932 369.07537
1933 412.46856
1934 498.92895
1935 564.75697
1936 647.59967
1937 662.19829
1938 698.91855
1939 707.48981
1940 848.19008
1941 745.16882
1942 512.83088
1943 654.65609
1944 613.1165
1945 649.12089
1946 729.50918
1947 878.45474
1948 934.77831
1949 1062.61851
1950 1184.48248
1951 1283.73264
1952 1374.69918
1953 1454.37799
1954 1588.4373
1955 1801.15915
1956 1974.8022
1957 2161.06244
1958 2306.69071
1959 2425.20543
1960 2525.01807
1961 2603.96823
1962 2732.9845
1963 2930.94793
1964 3117.06756
1965 3306.61952
1966 3491.97215
1967 3651.37451
1968 3753.96114
1969 3909.50932
1970 4112.05559
1971 4364.45066
1972 4592.80657
1973 4787.67004
1974 4970.93258
1975 5226.14638
1976 5427.75947
1977 5612.81168
1978 5805.8663
1979 5854.18108
1980 6084.94667
1981 5969.98573
1982 6082.86298
1983 6170.06481
1984 6225.59581
1985 6714.13188
1986 6732.46964
1987 7016.10089
1988 7208.91262
1989 7057.91533
1990 6617.45756
1991 6378.29969
1992 5826.863
1993 2555.899
1994 2706.246
1995 3410.31
1996 2563.233
1997 3234.294
1998 3362.639
1999 3014.274
2000 3465.315
2001 3542.322
2002 3043.61
2003 3428.645
2004 3644.998
2005 4352.729
2006 4382.065
2007 5064.127
2008 5559.172
2009 4360.063
2010 4217.05
2011 4917.447
2012 5694.851
2013 5496.833
2014 5529.836