Year Tonnes
1830 18335
1831 40337
1832 55005
1833 73340
1850 187017
1855 531715
1858 1015759
1859 1529139
1860 2207534
1861 3069279
1862 3846683
1863 4660757
1864 5573840
1865 6446586
1866 9204170
1867 12368791
1868 15001697
1869 18573355
1870 22449374
1871 27682183
1872 33054338
1873 38096463
1874 44216686
1875 51260993
1876 60006788
1877 68932266
1878 80596993
1879 92566081
1880 106607024
1881 121396035
1882 136973451
1883 154703396
1884 172704699
1885 192312148
1886 212421976
1887 233701577
1888 255897928
1889 279869107
1890 307015908
1891 336905625
1892 368544501
1893 405628872
1894 443398972
1895 486797917
1896 530977933
1897 582059243
1898 639348784
1899 705809492
1900 781096669
1901 858389695
1902 933042481
1903 1006067119
1904 1087313171
1905 1159835430
1906 1242555616
1907 1335209705
1908 1428432179
1909 1526839791
1910 1623347897
1911 1723405659
1912 1836748962
1913 1959875821
1914 2071000589
1915 2172998194
1916 2281710076
1917 2381760504
1918 2421661131
1919 2455742229
1920 2486820054
1921 2520523451
1922 2561626854
1923 2607031648
1924 2661127232
1925 2714518752
1926 2791877784
1927 2888055860
1928 2994904906
1929 3109975366
1930 3266413253
1931 3454350670
1932 3666094251
1933 3902733095
1934 4188975448
1935 4512984234
1936 4884521007
1937 5264433208
1938 5665412324
1939 6071308887
1940 6557927121
1941 6985440649
1942 7279658727
1943 7655243868
1944 8006997176
1945 8379406695
1946 8797936073
1947 9301917552
1948 9838212635
1949 10447851385
1950 11127405157
1951 11863900105
1952 12652583797
1953 13486980311
1954 14398288483
1955 15431638082
1956 16564609070
1957 17804440105
1958 19127820068
1959 20519193545
1960 21967830894
1961 23461763027
1962 25029713555
1963 26711238407
1964 28499542632.00001
1965 30396595409
1966 32399987519
1967 34494830942
1968 36648529715
1969 38891468600
1970 41250611048
1971 43754555992
1972 46389511845
1973 49136263526.99998
1974 51988155433
1975 54986466982
1976 58100446712
1977 61320593426
1978 64651498208
1979 68010121842.99998
1980 71501138846
1981 74926201187
1982 78416022748.00003
1983 81955873190.00003
1984 85527582528.00003
1985 89379571677.00003
1986 93242081449.00003
1987 97267314346.00003
1988 101403165965.00003
1989 105452388376.00003
1990 109248914150.00003
1991 112908231785.00005