1996 303 vehicles 1995 42,693 vehicles 1994 48,496 vehicles 1993 39,075 vehicles 1992 21,294 vehicles 1991 14,031 vehicles 1990 10,965 vehicles 1989 9,771 vehicles 1988 1,954 vehicles 1987 1,004 vehicles 1986 925 vehicles 1985 868 vehicles 1984 434 vehicles 1983 333 vehicles 1982 215 vehicles 1980 105 vehicles