Year Tonnes 1950 267691 1951 550050 1952 865412 1953 1232112 1954 1675819 1955 2126860 1956 2801588 1957 3619329 1958 4385732 1959 5218141 1960 6105555 1961 6970967 1962 7876716 1963 8863139 1964 9864230 1965 11015668 1966 12258781 1967 13622905 1968 15247386 1969 16919538 1970 18624693 1971 20509531 1972 22915083 1973 25415977 1974 27341152 1975 29321332 1976 31785556 1977 34455132 1978 37264054 1979 40267327 1980 43475952 1981 46523229 1982 49625511 1983 52724126 1984 55907082 1985 59009364 1986 62555353 1987 66677061 1988 70806103 1989 75147831 1990 79522562 1991 84212655 1992 89394126 1993 94843288 1994 100486801 1995 105869957 1996 111806830 1997 117666696 1998 124072945 1999 130449858 2000 137380488 2001 144226777 2002 151249082 2003 158997453 2004 166331453 2005 173834135 2006 181622843 2007 189818588 2008 198395701 2009 206507105 2010 214215139 2011 221640814 2012 228560443 2013 234508317 2014 240569868