Year Tonnes 1950 11001 1951 22002 1952 33003 1953 44004 1954 73340 1955 110010 1956 146680 1957 179683 1958 227354 1959 275025 1960 297027 1961 319029 1962 341031 1963 366700 1964 392369 1965 421705 1966 447374 1967 473043 1968 502379 1969 546383 1970 583053 1971 649059 1972 737067 1973 766403 1974 817741 1975 880080 1976 942419 1977 1004758 1978 1074431 1979 1136770 1980 1195442 1981 1265115 1982 1338455 1983 1400794 1984 1481468 1985 1547474 1986 1628148 1987 1727157 1988 1833500 1989 1950844 1990 2016850 1991 2159863 1992 2317544 1993 2416553 1994 2449556 1995 2577901 1996 2691578 1997 2981271 1998 3146286 1999 3611995 2000 4066703 2001 7161651 2002 12141437 2003 18158984 2004 23377125 2005 28089220 2006 32845319 2007 37641755 2008 42144831 2009 46765251 2010 51444343 2011 57571900 2012 62687365 2013 67850501 2014 73196987