1999 201 vehicles 1998 246 vehicles 1997 174 vehicles 1996 288 vehicles 1995 645 vehicles 1994 920 vehicles 1993 1,059 vehicles 1992 1,011 vehicles 1991 200 vehicles 1990 1,129 vehicles 1989 1,670 vehicles 1988 334 vehicles 1987 316 vehicles 1986 102 vehicles