2004 218 vehicles 2003 436 vehicles 2002 166 vehicles 1999 100 vehicles 1998 778 vehicles 1997 2,052 vehicles 1996 3,877 vehicles 1995 6,052 vehicles 1994 13,607 vehicles 1993 19,264 vehicles 1992 15,043 vehicles 1991 16,766 vehicles 1990 26,586 vehicles 1989 11,820 vehicles