2003 252 vehicles 2002 874 vehicles 2001 1,453 vehicles 2000 1,881 vehicles 1999 1,685 vehicles 1998 2,907 vehicles 1997 1,979 vehicles 1996 464 vehicles 1995 649 vehicles 1994 767 vehicles 1993 845 vehicles 1992 635 vehicles 1991 584 vehicles 1990 504 vehicles 1989 366 vehicles 1988 242 vehicles