1995 135 vehicles 1994 268 vehicles 1993 234 vehicles 1992 294 vehicles 1991 617 vehicles 1990 1,008 vehicles 1989 1,469 vehicles 1988 1,648 vehicles 1987 1,919 vehicles 1986 1,982 vehicles 1985 155 vehicles 1981 155 vehicles 1980 244 vehicles