Year Tonnes 1955 44004 1956 88008 1957 139346 1958 190684 1959 220020 1960 256690 1961 315362 1962 363033 1963 429039 1964 495045 1965 579386 1966 700397 1967 839743 1968 993757 1969 1155105 1970 1349456 1971 1576810 1972 1793163 1973 2002182 1974 2218535 1975 2431221 1976 2695245 1977 2970270 1978 3281965 1979 3564324 1980 3857684 1981 4187714 1982 4525078 1983 4946783 1984 5405158 1985 5991878 1986 6596933 1987 7205655 1988 7777707 1989 8320423 1990 8756796 1991 9189502 1992 9603873 1993 10029245 1994 10469285 1995 10898324 1996 11331030 1997 11782071 1998 12229445 1999 12724490 2000 13292875 2001 13971270 2002 14679001 2003 15449071 2004 16211807 2005 17033215 2006 17858290 2007 18676031 2008 19519441 2009 20366518 2010 21224596 2011 22057005 2012 22871079 2013 23692487 2014 24495560