2004 2,595 vehicles 2003 6,985 vehicles 2002 7,309 vehicles 2001 7,302 vehicles 2000 7,648 vehicles 1999 7,933 vehicles 1998 8,939 vehicles 1997 7,990 vehicles 1996 8,848 vehicles 1995 9,204 vehicles 1994 8,304 vehicles 1993 7,587 vehicles 1992 6,010 vehicles 1991 6,343 vehicles 1990 10,601 vehicles 1989 14,646 vehicles 1988 15,332 vehicles 1987 11,796 vehicles 1986 1,554 vehicles