Year Tonnes 1916 11001 1917 40337 1918 80674 1920 110010 1921 132012 1922 132012 1923 132012 1924 132012 1932 132012 1933 150347 1934 168682 1935 187017 1936 212686 1937 242022 1938 275025 1939 308028 1940 366700 1941 502379 1942 663727 1943 715065 1944 806740 1945 902082 1946 1034094 1947 1162439 1948 1309119 1949 1437464 1950 2658575 1951 4037367 1952 5482165 1953 6860957 1954 8269085 1955 9867897 1956 11430039 1957 13006849 1958 14455314 1959 16046792 1960 17773949 1961 19541443 1962 21338273 1963 23285450 1964 26043034 1965 28507258 1966 31393187 1967 34480801 1968 38078128 1969 41935812 1970 45679819 1971 49893202 1972 54630966 1973 59460405 1974 64858229 1975 70406400 1976 76255265 1977 83013546 1978 90505227 1979 99276691 1980 108770554 1981 118605448 1982 128132314 1983 139437675 1984 150985058 1985 162924810 1986 174989240 1987 186738308 1988 199202441 1989 212436644 1990 225703850 1991 241193258 1992 256216957 1993 272718457 1994 288658906 1995 304394003 1996 321152193 1997 338097400 1998 356098703 1999 374430036 2000 394352847 2001 415170406 2002 436031969 2003 457278567 2004 479577594 2005 502239654 2006 525231744 2007 549342269 2008 574167859 2009 598956779 2010 626616960 2011 652637992 2012 679641780 2013 707309295 2014 736139249