Year Tonnes 1951 3667 1952 7334 1953 11001 1954 14668 1955 18335 1956 25669 1957 36670 1958 44004 1959 51338 1960 62339 1961 73340 1962 84341 1963 91675 1964 102676 1965 113677 1966 124678 1967 135679 1968 150347 1969 165015 1970 179683 1971 190684 1972 201685 1973 216353 1974 234688 1975 253023 1976 282359 1977 311695 1978 344698 1979 377701 1980 418038 1981 462042 1982 509713 1983 564718 1984 616056 1985 671061 1986 722399 1987 773737 1988 821408 1989 869079 1990 916750 1991 964421 1992 1012092 1993 1059763 1994 1107434 1995 1155105 1996 1202776 1997 1250447 1998 1298118 1999 1345789 2000 1393460 2001 1444798 2002 1503470 2003 1569476 2004 1642816 2005 1719823 2006 1804164 2007 1888505 2008 1972846 2009 2064521 2010 2163530 2011 2266206 2012 2379883 2013 2493560 2014 2607237