Year Tonnes
1879 0
1880 0
1881 3.667
1882 3.667
1883 7.334
1884 11.001
1885 7.334
1886 7.334
1887 11.001
1888 18.335
1889 25.669
1890 33.003
1891 40.337
1892 47.671
1893 62.339
1894 80.674
1895 84.341
1896 106.343
1897 110.01
1898 146.68
1899 146.68
1900 216.353
1901 271.358
1902 238.355
1903 234.688
1904 300.694
1905 359.366
1906 315.362
1907 454.708
1908 597.721
1909 605.055
1910 634.391
1911 898.415
1912 898.415
1913 788.405
1914 1184.441
1915 762.736
1916 924.084
1917 1140.437
1918 1422.796
1919 836.076
1920 1100.1
1921 1367.791
1922 1510.804
1923 1606.146
1924 1844.501
1925 1811.498
1926 1782.162
1927 1818.832
1928 2141.528
1929 2486.226
1930 2405.552
1931 2277.207
1932 2640.24
1933 2350.547
1934 2442.222
1935 2475.225
1936 2515.562
1937 2790.587
1938 3175.622
1939 3487.317
1940 4103.373
1941 4426.069
1942 5353.82
1943 5815.862
1944 4393.066
1945 5214.474
1946 4979.786
1947 5914.871
1948 6226.566
1949 7458.678
1950 7506.349
1951 8173.743
1952 9438.858
1953 10597.63
1954 11404.37
1955 12104.767
1956 12981.18
1957 14403.976
1958 15643.422
1959 19644.119
1960 22295.36
1961 25973.361
1962 30736.794
1963 34411.128
1964 42863.563
1965 46317.877
1966 48767.433
1967 55166.348
1968 59526.411
1969 66376.367
1970 61238.9
1971 64300.845
1972 66171.015
1973 68825.923
1974 71260.811
1975 73061.308
1976 73116.313
1977 75969.239
1978 81411.067
1979 79152.195
1980 77487.377
1981 80343.97
1982 90131.193
1983 90365.881
1984 87366.275
1985 89540.806
1986 91528.32
1987 91634.663
1988 87289.268
1989 86739.218
1990 74480.437
1991 57549.898
1992 54205.594
1993 67861.502
1994 54161.59
1995 58004.606
1996 56559.808
1997 51616.692
1998 48998.454
1999 43981.998
2000 43530.957
2001 46453.556
2002 44634.724
2003 47307.967
2004 46801.921
2005 47916.689
2006 48991.12
2007 52254.75
2008 50740.279
2009 42665.545
2010 44114.01
2011 49346.819
2012 44708.064
2013 39599.933
2014 42416.189