Year Tonnes
1830 0.18115
1831 0.21738
1832 0.14492
1833 0.18115
1850 1.12314
1855 3.40565
1858 4.7824
1859 5.07224
1860 6.70261
1861 8.51412
1862 7.68082
1863 8.04313
1864 9.02135
1865 8.62281
1866 27.24519
1867 31.26675
1868 26.01336
1869 35.28832
1870 38.29543
1871 51.70064
1872 53.0774
1873 49.81667
1874 60.46838
1875 69.59842
1876 86.40928
1877 88.18456
1878 115.2486
1879 118.25571
1880 138.72584
1881 146.11682
1882 153.90633
1883 175.17352
1884 177.85457
1885 193.72344
1886 198.68699
1887 210.24446
1888 219.30203
1889 236.8375
1890 268.21295
1891 295.31321
1892 312.59507
1893 366.39707
1894 373.17214
1895 428.78566
1896 436.50271
1897 504.68815
1898 566.02605
1899 656.63804
1900 743.84439
1901 763.66236
1902 737.57655
1903 721.49029
1904 802.71863
1905 716.52674
1906 817.28322
1907 915.43111
1908 921.04681
1909 972.27646
1910 953.50916
1911 988.5801
1912 1119.84249
1913 1216.50494
1914 1097.92316
1915 1007.74593
1916 1074.08362
1917 988.50764
1918 394.22195
1919 336.72445
1920 307.05183
1921 332.99273
1922 406.10549
1923 448.60363
1924 534.46946
1925 527.51324
1926 764.31451
1927 950.24843
1928 1055.67862
1929 1136.90696
1930 1545.62103
1931 1856.83935
1932 2092.04649
1933 2338.01403
1934 2828.10136
1935 3201.23727
1936 3670.81825
1937 3753.56827
1938 3961.71137
1939 4010.29621
1940 4807.83391
1941 4223.87386
1942 2906.90228
1943 3710.81651
1944 3475.35576
1945 3679.44107
1946 4135.10961
1947 4979.3844
1948 5298.64585
1949 6023.28817
1950 6714.05517
1951 7276.63934
1952 7792.26904
1953 8243.91602
1954 9003.81043
1955 10209.5912
1956 11193.85989
1957 12249.64721
1958 13075.11847
1959 13746.90078
1960 14312.67322
1961 14760.18995
1962 15491.49865
1963 16613.62365
1964 17668.6139
1965 18743.05982
1966 19793.70242
1967 20697.25
1968 21278.74639
1969 22160.44709
1970 23308.54921
1971 24739.21149
1972 26033.61159
1973 27138.16489
1974 28176.96019
1975 29623.60003
1976 30766.41254
1977 31815.35232
1978 32909.65245
1979 33183.51732
1980 34491.57625
1981 33839.93799
1982 34479.76517
1983 34974.05522
1984 35288.8241
1985 38058.01499
1986 38161.95974
1987 39769.67951
1988 40862.60289
1989 40006.69817
1990 37510.03163
1991 36154.40232
1992 33028.669
1993 28316.574
1994 33534.715
1995 34000.424
1996 30670.788
1997 30623.117
1998 32093.584
1999 37678.425
2000 37539.079
2001 38074.461
2002 39966.633
2003 44601.721
2004 46541.564
2005 48338.394
2006 49511.834
2007 56042.761
2008 56831.166
2009 50340.576
2010 57289.541
2011 62467.345
2012 64872.897
2013 66735.733
2014 68422.553