1998 111 vehicles 1994 114 vehicles 1993 1,207 vehicles 1992 2,789 vehicles 1991 2,611 vehicles 1990 3,003 vehicles 1989 2,683 vehicles 1988 2,107 vehicles 1987 1,367 vehicles 1986 753 vehicles 1985 190 vehicles 1984 210 vehicles 1983 216 vehicles 1982 160 vehicles