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1970 FIM Motocross World Championship1971 FIM Motocross World Championship1972 FIM Motocross World Championship1973 FIM Motocross World Championship1974 FIM Motocross World Championship1975 FIM Motocross World Championship1976 FIM Motocross World Championship1977 FIM Motocross World Championship1978 FIM Motocross World Championship1979 FIM Motocross World Championship2008 FIM Motocross World Championship2009 FIM Motocross World Championship2010 FIM Motocross World Championship2011 FIM Motocross World Championship2012 FIM Motocross World Championship2013 FIM Motocross World Championship2014 FIM Motocross World Championship