1998 114 vehicles 1997 126 vehicles 1996 141 vehicles 1995 3,409 vehicles 1994 11,613 vehicles 1993 9,906 vehicles 1992 8,255 vehicles 1991 2,831 vehicles 1990 3,429 vehicles 1989 3,195 vehicles 1988 2,609 vehicles 1987 1,402 vehicles 1986 309 vehicles 1985 281 vehicles 1984 222 vehicles 1983 144 vehicles