Year Tonnes
1830 0.06152
1831 0.07383
1832 0.04922
1833 0.06152
1850 0.38145
1855 1.15664
1858 1.62422
1859 1.72266
1860 2.27637
1861 2.89161
1862 2.6086
1863 2.73165
1864 3.06387
1865 2.92852
1866 9.25314
1867 10.61896
1868 8.83478
1869 11.98479
1870 13.00608
1871 17.55882
1872 18.0264
1873 16.91897
1874 20.53656
1875 23.63734
1876 29.34673
1877 29.94966
1878 39.14128
1879 40.16257
1880 47.11473
1881 49.62489
1882 52.2704
1883 59.49326
1884 60.40381
1885 65.79327
1886 67.47902
1887 71.40422
1888 74.4804
1889 80.43587
1890 91.09175
1891 100.29567
1892 106.16502
1893 124.43751
1894 126.73849
1895 145.62622
1896 148.24712
1897 171.40458
1898 192.23645
1899 223.01052
1900 252.62795
1901 259.35863
1902 250.49924
1903 245.03595
1904 272.6231
1905 243.3502
1906 277.5696
1907 310.90305
1908 312.81028
1909 330.20914
1910 323.8353
1911 335.74625
1912 380.32621
1913 413.15517
1914 372.88186
1915 342.25545
1916 364.78536
1917 335.72165
1918 133.88752
1919 114.35995
1920 104.2824
1921 113.09257
1922 137.92347
1923 152.35689
1924 181.51905
1925 179.15654
1926 259.58011
1927 322.72787
1928 358.53457
1929 386.12173
1930 524.93114
1931 630.62858
1932 710.51074
1933 794.0474
1934 960.49318
1935 1087.21936
1936 1246.70068
1937 1274.80463
1938 1345.49518
1939 1361.99579
1940 1632.85932
1941 1434.53204
1942 987.25592
1943 1260.28508
1944 1180.31678
1945 1249.6292
1946 1404.38551
1947 1691.12211
1948 1799.5512
1949 2045.65766
1950 2280.25922
1951 2471.32672
1952 2646.44732
1953 2799.8378
1954 3057.91674
1955 3467.42972
1956 3801.71171
1957 4160.2832
1958 4440.63366
1959 4668.78755
1960 4860.93787
1961 5012.92562
1962 5261.29614
1963 5642.39755
1964 6000.69834
1965 6365.60675
1966 6722.43097
1967 7029.29807
1968 7226.78863
1969 7526.236
1970 7916.15988
1971 8402.04818
1972 8841.65847
1973 9216.7921
1974 9569.59268
1975 10060.90735
1976 10449.03475
1977 10805.28064
1978 11176.93204
1979 11269.94332
1980 11714.19249
1981 11492.88002
1982 11710.18115
1983 11878.05428
1984 11984.95758
1985 12925.44331
1986 12960.74551
1987 13506.76692
1988 13877.95073
1989 13587.26432
1990 12739.3346
1991 12278.92935
1992 11217.353
1993 8621.117
1994 6226.566
1995 4528.745
1996 5694.851
1997 5610.51
1998 5955.208
1999 4671.758
2000 4635.088
2001 3894.354
2002 4957.784
2003 5438.161
2004 5874.534
2005 5592.175
2006 5507.834
2007 6629.936
2008 7660.363
2009 6791.284
2010 6384.247
2011 7656.696
2012 10131.921
2013 9842.228
2014 9607.54