Year Tonnes
1899 95.342
1902 95.342
1903 1965.512
1904 2090.19
1905 2299.209
1906 17124.89
1907 16853.532
1908 22750.068
1909 20854.229
1910 18764.039
1911 27869.2
1912 9794.557
1913 10766.312
1914 15119.041
1915 16101.797
1916 17979.301
1917 19867.806
1918 21059.581
1919 24275.54
1920 26791.102
1921 25309.634
1922 26655.423
1923 32177.925
1924 35122.526
1925 33248.689
1926 29614.692
1927 33553.05
1928 34143.437
1929 35848.592
1930 37953.45
1931 40292.996
1932 38631.845
1933 42251.174
1934 49313.816
1935 57674.576
1936 65092.917
1937 60626.511
1938 55349.698
1939 67212.443
1940 86170.833
1941 107703.457
1942 113963.026
1943 97384.519
1944 97945.57
1945 50391.914
1946 31301.512
1947 33615.389
1948 23872.17
1949 59357.729
1950 78712.155
1951 101806.921
1952 128326.665
1953 134212.2
1954 161388.337
1955 191047.033
1956 216525.349
1957 256557.988
1958 525811.13
1959 721749.941
1960 780726.302
1961 552066.85
1962 440359.029
1963 436695.696
1964 436923.05
1965 475972.933
1966 522789.522
1967 433234.048
1968 468928.626
1969 577237.138
1970 771617.474
1971 876633.02
1972 931575.681
1973 968542.708
1974 988014.478
1975 1145607.47
1976 1196193.735
1977 1310310.775
1978 1462168.579
1979 1494859.884
1980 1467192.369
1981 1451501.276
1982 1580260.647
1983 1667029.201
1984 1814908.31
1985 1966553.428
1986 2068969.071
1987 2209708.531
1988 2369501.723
1989 2408540.605
1990 2442431.019
1991 2565594.548
1992 2690455.898
1993 2878694.009
1994 3058241.33
1995 3320285.15
1996 3463089.131
1997 3469510.048
1998 3324344.519
1999 3318055.614
2000 3405179.867
2001 3487566.356
2002 3850269.326
2003 4540417.061
2004 5233538.733
2005 5896957.705
2006 6529291.518
2007 7030797.772
2008 7553070.247
2009 8001008.965
2010 8776040.416
2011 9733538.12
2012 10028573.939
2013 10258007.128
2014 10291926.878