2000 649 vehicles 1999 986 vehicles 1998 1,638 vehicles 1997 2,280 vehicles 1996 1,099 vehicles 1995 1,765 vehicles 1994 2,082 vehicles 1993 2,978 vehicles 1992 2,548 vehicles 1991 1,341 vehicles 1990 1,048 vehicles 1989 822 vehicles 1988 393 vehicles 1987 139 vehicles 1986 160 vehicles 1985 131 vehicles