Year Tonnes 1950 3667 1951 7334 1952 18335 1953 25669 1954 33003 1955 40337 1956 47671 1957 55005 1958 66006 1959 77007 1960 88008 1961 99009 1962 110010 1963 124678 1964 143013 1965 157681 1966 176016 1967 194351 1968 216353 1969 245689 1970 275025 1971 304361 1972 341031 1973 381368 1974 414371 1975 447374 1976 480377 1977 513380 1978 550050 1979 579386 1980 616056 1981 652726 1982 693063 1983 740734 1984 806740 1985 872746 1986 938752 1987 1015759 1988 1081765 1989 1158772 1990 1239446 1991 1316453 1992 1400794 1993 1503470 1994 1624481 1995 1752826 1996 1884838 1997 2016850 1998 2178198 1999 2343213 2000 2489893 2001 2669576 2002 2856593 2003 3054611 2004 3274631 2005 3494651 2006 3714671 2007 3942025 2008 4169379 2009 4481074 2010 4701094 2011 4899112 2012 5152135 2013 5361154 2014 5570173