Year Tonnes 1950 44004 1951 102676 1952 209019 1953 300694 1954 385035 1955 495045 1956 630724 1957 770070 1958 916750 1959 1052429 1960 1210110 1961 1386126 1962 1543807 1963 1694154 1964 1895839 1965 2075522 1966 2277207 1967 2489893 1968 2713580 1969 2911598 1970 3138952 1971 3369973 1972 3622996 1973 4048368 1974 4492075 1975 4950450 1976 5419826 1977 5874534 1978 6299906 1979 6761948 1980 7198321 1981 7587023 1982 7983059 1983 8434100 1984 8877807 1985 9328848 1986 9750553 1987 10322605 1988 10967997 1989 11749068 1990 12251447 1991 12790496 1992 13252538 1993 13791587 1994 14323302 1995 14855017 1996 15383065 1997 15907446 1998 16428160 1999 16941540 2000 17458587 2001 17986635 2002 18544019 2003 19105070 2004 19688123 2005 20271176 2006 20923902 2007 21653635 2008 22302694 2009 22779404 2010 23388126 2011 23831833 2012 24308543 2013 24766918 2014 25342637