1995 171 vehicles 1994 338 vehicles 1993 438 vehicles 1992 601 vehicles 1991 530 vehicles 1990 741 vehicles 1989 1,680 vehicles 1988 2,465 vehicles 1987 3,448 vehicles 1986 4,242 vehicles 1985 3,865 vehicles 1984 3,722 vehicles 1983 2,789 vehicles