1995 331 vehicles 1994 4,841 vehicles 1993 4,407 vehicles 1992 3,057 vehicles 1991 2,896 vehicles 1990 2,870 vehicles 1989 1,840 vehicles 1988 1,700 vehicles 1987 1,053 vehicles 1986 899 vehicles 1985 1,241 vehicles 1984 1,367 vehicles 1983 1,383 vehicles 1982 1,783 vehicles 1981 510 vehicles 1980 400 vehicles