Year Tonnes
1830 0.04012
1831 0.04815
1832 0.0321
1833 0.04012
1850 0.24877
1855 0.75433
1858 1.05927
1859 1.12347
1860 1.48459
1861 1.88583
1862 1.70126
1863 1.78151
1864 1.99818
1865 1.9099
1866 6.03466
1867 6.92541
1868 5.76181
1869 7.81616
1870 8.48222
1871 11.4514
1872 11.75635
1873 11.03411
1874 13.39341
1875 15.41566
1876 19.13917
1877 19.53239
1878 25.52692
1879 26.19298
1880 30.727
1881 32.36406
1882 34.08939
1883 38.79995
1884 39.39379
1885 42.90866
1886 44.00805
1887 46.56797
1888 48.57417
1889 52.45818
1890 59.40766
1891 65.41022
1892 69.23806
1893 81.1549
1894 82.65554
1895 94.97362
1896 96.6829
1897 111.78559
1898 125.3716
1899 145.44165
1900 164.75736
1901 169.14693
1902 163.36907
1903 159.80605
1904 177.79768
1905 158.70666
1906 181.02365
1907 202.76286
1908 204.0067
1909 215.35378
1910 211.19693
1911 218.96495
1912 248.03883
1913 269.44902
1914 243.18382
1915 223.21007
1916 237.9035
1917 218.9489
1918 87.31795
1919 74.58258
1920 68.01026
1921 73.75602
1922 89.95009
1923 99.36319
1924 118.38199
1925 116.84122
1926 169.29138
1927 210.4747
1928 233.8269
1929 251.81852
1930 342.34639
1931 411.27951
1932 463.37657
1933 517.857
1934 626.4086
1935 709.05611
1936 813.06566
1937 831.39433
1938 877.49686
1939 888.25813
1940 1064.90825
1941 935.56438
1942 643.86256
1943 821.92505
1944 769.77181
1945 814.97557
1946 915.90359
1947 1102.90573
1948 1173.62035
1949 1334.12456
1950 1487.12558
1951 1611.73482
1952 1725.9439
1953 1825.98118
1954 1994.29353
1955 2261.36721
1956 2479.37721
1957 2713.22818
1958 2896.06543
1959 3044.86145
1960 3170.17687
1961 3269.29932
1962 3431.28009
1963 3679.82449
1964 3913.49891
1965 4151.48266
1966 4384.19411
1967 4584.32483
1968 4713.12302
1969 4908.41478
1970 5162.71297
1971 5479.59664
1972 5766.299
1973 6010.95137
1974 6241.0387
1975 6561.46132
1976 6814.58788
1977 7046.92216
1978 7289.3035
1979 7349.96304
1980 7639.69075
1981 7495.35653
1982 7637.07467
1983 7746.55714
1984 7816.27668
1985 8429.63694
1986 8452.66012
1987 8808.76103
1988 9050.83743
1989 8861.25934
1990 8308.2617
1991 8007.9974
1992 7315.665
1993 5177.804
1994 2357.881
1995 2449.556
1996 2827.257
1997 2152.529
1998 2497.227
1999 2519.229
2000 2236.87
2001 2291.875
2002 1881.171
2003 2075.522
2004 2563.233
2005 2442.222
2006 2658.575
2007 3234.294
2008 2904.264
2009 2453.223
2010 2544.898
2011 2350.547
2012 2933.6
2013 3479.983
2014 5188.805