Year Tonnes 1933 3667 1934 11001 1935 14668 1945 22002 1947 25669 1948 29336 1949 33003 1950 337364 1951 583053 1952 891081 1953 1144104 1954 1433797 1955 1738158 1956 2057187 1957 2372549 1958 2746583 1959 3120617 1960 3520320 1961 3876019 1962 4272055 1963 4734097 1964 5218141 1965 5775525 1966 6354911 1967 7198321 1968 8111404 1969 8962148 1970 9933903 1971 10960663 1972 12247780 1973 13322211 1974 14510319 1975 16204473 1976 17198230 1977 18045307 1978 19064733 1979 20197836 1980 21814983 1981 22841743 1982 23857502 1983 24510228 1984 25379307 1985 26435403 1986 27575840 1987 28862957 1988 30153741 1989 31085159 1990 32034912 1991 33069006 1992 34073764 1993 35104191 1994 36372973 1995 37638088 1996 39002212 1997 40652362 1998 42390520 1999 44308361 2000 46182198 2001 47924023 2002 49159802 2003 50861290 2004 52669121 2005 54410946 2006 56094099 2007 57909264 2008 59797769 2009 61568930 2010 63527108 2011 65866654 2012 68572900 2013 71689850 2014 74766463