Year Tonnes 1950 18335 1951 44004 1952 69673 1953 99009 1954 128345 1955 157681 1956 187017 1957 216353 1958 256690 1959 297027 1960 341031 1961 377701 1962 447374 1963 509713 1964 594054 1965 678395 1966 759069 1967 880080 1968 982756 1969 1118435 1970 1239446 1971 1382459 1972 1540140 1973 1686820 1974 1840834 1975 2016850 1976 2192866 1977 2390884 1978 2607237 1979 2816256 1980 3006940 1981 3190290 1982 3362639 1983 3534988 1984 3707337 1985 3898021 1986 4103373 1987 4330727 1988 4580083 1989 4880777 1990 5192472 1991 5551838 1992 5907537 1993 6285238 1994 6659272 1995 7036973 1996 7345001 1997 7733703 1998 8104070 1999 8452435 2000 8848471 2001 9295845 2002 9728551 2003 10161257 2004 10553626 2005 10975331 2006 11419038 2007 11895748 2008 12332121 2009 12918841 2010 13457890 2011 14059278 2012 14535988 2013 15049368 2014 15544413