2000 115 vehicles 1999 342 vehicles 1998 262 vehicles 1997 222 vehicles 1996 199 vehicles 1995 437 vehicles 1994 338 vehicles 1993 271 vehicles 1992 364 vehicles 1991 722 vehicles 1990 1,403 vehicles 1989 729 vehicles 1988 377 vehicles 1987 223 vehicles 1986 314 vehicles 1985 244 vehicles 1984 350 vehicles 1983 159 vehicles 1982 169 vehicles 1981 136 vehicles 1980 123 vehicles