1994 289 vehicles 1993 2,363 vehicles 1992 3,973 vehicles 1991 8,005 vehicles 1990 8,314 vehicles 1989 15,156 vehicles 1988 19,177 vehicles 1987 16,886 vehicles 1986 11,231 vehicles 1985 13,783 vehicles 1984 9,661 vehicles 1983 1,265 vehicles