Year Tonnes
1830 0.30846
1831 0.37015
1832 0.24677
1833 0.30846
1850 1.91247
1855 5.79909
1858 8.14341
1859 8.63695
1860 11.41311
1861 14.49773
1862 13.07881
1863 13.69573
1864 15.36143
1865 14.68281
1866 46.39275
1867 53.24061
1868 44.2952
1869 60.08848
1870 65.20895
1871 88.03517
1872 90.37949
1873 84.82716
1874 102.96475
1875 118.51126
1876 147.13657
1877 150.1595
1878 196.24379
1879 201.36426
1880 236.22051
1881 248.80578
1882 262.06966
1883 298.28315
1884 302.84839
1885 329.8697
1886 338.32157
1887 358.00147
1888 373.42459
1889 403.28375
1890 456.70944
1891 502.85542
1892 532.28273
1893 623.89607
1894 635.43256
1895 730.13052
1896 743.27102
1897 859.37627
1898 963.82165
1899 1118.11454
1900 1266.60835
1901 1300.35413
1902 1255.93555
1903 1228.54409
1904 1366.85863
1905 1220.09222
1906 1391.65901
1907 1558.78394
1908 1568.34628
1909 1655.57945
1910 1623.62274
1911 1683.34106
1912 1906.85292
1913 2071.44847
1914 1869.52897
1915 1715.97639
1916 1828.93532
1917 1683.21768
1918 671.2759
1919 573.36993
1920 522.84378
1921 567.0156
1922 691.51103
1923 763.87631
1924 910.08749
1925 898.24254
1926 1301.4646
1927 1618.07042
1928 1797.59554
1929 1935.91008
1930 2631.86297
1931 3161.80139
1932 3562.30898
1933 3981.13924
1934 4815.65345
1935 5451.02432
1936 6250.62058
1937 6391.52621
1938 6745.94951
1939 6828.67913
1940 8186.71574
1941 7192.35631
1942 4949.8346
1943 6318.72908
1944 5917.78964
1945 6265.30339
1946 7041.20973
1947 8478.82964
1948 9022.46379
1949 10256.37512
1950 11432.60398
1951 12390.56484
1952 13268.57224
1953 14037.63072
1954 15331.56884
1955 17384.75633
1956 19060.75599
1957 20858.53661
1958 22264.13811
1959 23408.04011
1960 24371.42991
1961 25133.45545
1962 26378.7182
1963 28289.45775
1964 30085.88113
1965 31915.43337
1966 33704.45366
1967 35243.00246
1968 36233.1668
1969 37734.51504
1970 39689.4881
1971 42125.60083
1972 44329.68813
1973 46210.50682
1974 47979.35367
1975 50442.67278
1976 52388.63874
1977 54174.75947
1978 56038.1192
1979 56504.45267
1980 58731.79804
1981 57622.19706
1982 58711.68629
1983 59553.35682
1984 60089.3411
1985 64804.68257
1986 64981.6783
1987 67719.28219
1988 69580.2976
1989 68122.87441
1990 63871.58378
1991 61563.23619
1992 56240.779
1993 48452.071
1994 41976.149
1995 33333.03
1996 31257.508
1997 29809.043
1998 31675.546
1999 28576.931
2000 29508.349
2001 28771.282
2002 29614.692
2003 30615.783
2004 32089.917
2005 34337.788
2006 39167.227
2007 30509.44
2008 35503.894
2009 31902.9
2010 30678.122
2011 33446.707
2012 35555.232
2013 35643.24
2014 37487.741