Year Tonnes
1865 150.347
1866 209.019
1867 227.354
1868 176.016
1869 267.691
1870 157.681
1871 198.018
1872 245.689
1873 238.355
1874 256.69
1875 352.032
1876 275.025
1877 447.374
1878 326.363
1879 124.678
1880 139.346
1881 183.35
1882 154.014
1883 161.348
1884 176.016
1885 194.351
1886 135.679
1887 245.689
1888 267.691
1889 403.37
1890 366.7
1891 403.37
1892 410.704
1893 425.372
1894 392.369
1895 374.034
1896 443.707
1897 315.362
1898 524.381
1899 671.061
1900 1037.761
1901 949.753
1902 1048.762
1903 1206.443
1904 1367.791
1905 1532.806
1906 1580.477
1907 1881.171
1908 1723.49
1909 1958.178
1910 1884.838
1911 2229.536
1912 1998.515
1913 2038.852
1914 1664.818
1915 1037.761
1916 513.38
1917 392.369
1918 458.375
1919 938.752
1920 1404.461
1921 843.41
1922 1012.092
1923 1474.134
1924 2453.223
1925 2368.882
1926 3010.607
1927 3281.965
1928 3127.951
1929 3553.323
1930 3975.028
1931 3942.025
1932 4004.364
1933 4668.091
1934 5797.527
1935 5940.54
1936 5870.867
1937 4250.053
1938 4638.755
1939 4910.113
1940 5474.831
1941 5625.178
1942 4950.45
1943 6123.89
1944 7029.639
1945 7095.645
1946 7029.639
1947 7484.347
1948 7708.034
1949 7975.725
1950 9497.53
1951 10194.26
1952 10483.953
1953 12977.513
1954 13446.889
1955 13633.906
1956 14374.64
1957 15988.12
1958 16054.126
1959 17212.898
1960 16820.529
1961 17363.245
1962 21631.633
1963 22669.394
1964 26336.394
1965 27388.823
1966 31547.201
1967 33523.714
1968 36314.301
1969 38807.861
1970 42639.876
1971 47733.339
1972 53857.229
1973 59486.074
1974 61136.224
1975 65697.972
1976 73721.368
1977 81572.415
1978 77256.356
1979 75576.87
1980 75763.887
1981 79874.594
1982 86988.574
1983 90541.897
1984 95796.708
1985 106717.034
1986 116881.958
1987 129907.142
1988 126309.815
1989 139316.664
1990 145858.592
1991 148619.843
1992 153108.251
1993 159136.799
1994 156848.591
1995 171974.966
1996 188205.108
1997 198535.047
1998 200614.236
1999 196771.22
2000 216151.315
2001 194552.685
2002 205685.697
2003 218523.864
2004 225421.491
2005 237390.579
2006 261614.781
2007 284658.209
2008 283979.814
2009 277844.923
2010 298002.422
2011 320840.498
2012 329560.624
2013 324771.522
2014 345981.45