1995 578 vehicles 1994 166 vehicles 1993 276 vehicles 1992 2,084 vehicles 1991 4,555 vehicles 1990 2,697 vehicles 1989 4,845 vehicles 1988 5,198 vehicles 1987 5,213 vehicles 1986 792 vehicles 1984 1,146 vehicles 1983 2,301 vehicles 1982 3,259 vehicles