1996 797 vehicles 1995 2,499 vehicles 1994 2,686 vehicles 1993 1,176 vehicles 1992 681 vehicles 1991 927 vehicles 1990 3,443 vehicles 1989 3,444 vehicles 1988 2,172 vehicles 1987 1,072 vehicles 1986 848 vehicles 1985 459 vehicles 1983 104 vehicles