Year Tonnes 1950 117344 1951 220020 1952 293360 1953 359366 1954 414371 1955 473043 1956 524381 1957 575719 1958 630724 1959 678395 1960 726066 1961 777404 1962 832409 1963 887414 1964 942419 1965 990090 1966 1045095 1967 1107434 1968 1173440 1969 1239446 1970 1309119 1971 1389793 1972 1463133 1973 1547474 1974 1624481 1975 1712489 1976 1789496 1977 1866503 1978 1936176 1979 2027851 1980 2115859 1981 2167197 1982 2189199 1983 2225869 1984 2258872 1985 2302876 1986 2343213 1987 2390884 1988 2460557 1989 2530230 1990 2673243 1991 2871261 1992 3105949 1993 3344304 1994 3626663 1995 3901688 1996 4184047 1997 4477407 1998 4785435 1999 5104464 2000 5438161 2001 5782859 2002 6131224 2003 6486923 2004 6871958 2005 7271661 2006 7689699 2007 8104070 2008 8529442 2009 8991484 2010 9457193 2011 9908234 2012 10370276 2013 10861654 2014 11389702