Year Tonnes
1857 0
1858 3.667
1859 3.667
1860 3.667
1861 7.334
1862 11.001
1863 11.001
1864 14.668
1865 14.668
1866 18.335
1867 22.002
1868 25.669
1869 25.669
1870 36.67
1871 40.337
1872 40.337
1873 44.004
1874 44.004
1875 47.671
1876 47.671
1877 47.671
1878 47.671
1879 47.671
1880 47.671
1881 51.338
1882 223.687
1883 407.037
1884 473.043
1885 451.041
1886 484.044
1887 528.048
1888 630.724
1889 645.392
1890 806.74
1891 1118.435
1892 1052.429
1893 1136.77
1894 1041.428
1895 1078.098
1896 1118.435
1897 1298.118
1898 1712.489
1899 1613.48
1900 1239.446
1901 1595.145
1902 1591.478
1903 1848.168
1904 2189.199
1905 2662.242
1906 3600.994
1907 4561.748
1908 4389.399
1909 4862.442
1910 4822.105
1911 5779.192
1912 6017.547
1913 6996.636
1914 5790.193
1915 5148.468
1916 2999.606
1917 2515.562
1918 3190.29
1919 4668.091
1920 5489.499
1921 5922.205
1922 7146.983
1923 8481.771
1924 10014.577
1925 11719.732
1926 14513.986
1927 16138.467
1928 18287.329
1929 20509.531
1930 23263.448
1931 25870.685
1932 27381.489
1933 27333.818
1934 31686.547
1935 31558.202
1936 33182.683
1937 28488.923
1938 26736.097
1939 25210.625
1940 23967.512
1941 22566.718
1942 23692.487
1943 22126.678
1944 15071.37
1945 18921.72
1946 17480.589
1947 16362.154
1948 23395.46
1949 23135.103
1950 19435.1
1951 22526.381
1952 26659.09
1953 30659.787
1954 33538.382
1955 36820.347
1956 40821.044
1957 45976.846
1958 49845.531
1959 50696.275
1960 53450.192
1961 55775.07
1962 63879.14
1963 69529.987
1964 72115.222
1965 78723.156
1966 84183.319
1967 92129.708
1968 100189.774
1969 111649.149
1970 120112.585
1971 125829.438
1972 132422.704
1973 144960.177
1974 150944.721
1975 162257.416
1976 174765.553
1977 178399.55
1978 193903.626
1979 196074.49
1980 196617.206
1981 198153.679
1982 195773.796
1983 200562.898
1984 189272.205
1985 194343.666
1986 202147.042
1987 212165.286
1988 212777.675
1989 214141.799
1990 174087.158
1991 140288.419
1992 128645.694
1993 125297.723
1994 119140.83
1995 126049.458
1996 125407.733
1997 112624.571
1998 99830.408
1999 89742.491
2000 90681.243
2001 96632.784
2002 97237.839
2003 101062.52
2004 96904.142
2005 96456.768
2006 103350.728
2007 102224.959
2008 96365.093
2009 81576.082
2010 79412.552
2011 84880.049
2012 81722.762
2013 70945.449
2014 70003.03