2006 241 vehicles 2005 671 vehicles 2004 675 vehicles 2003 871 vehicles 2002 815 vehicles 2001 856 vehicles 2000 939 vehicles 1999 926 vehicles 1998 734 vehicles 1997 608 vehicles 1996 748 vehicles 1995 1,132 vehicles 1994 1,003 vehicles 1993 691 vehicles 1992 499 vehicles 1991 442 vehicles 1990 821 vehicles 1989 1,637 vehicles 1988 1,516 vehicles 1987 773 vehicles 1986 611 vehicles 1985 455 vehicles 1984 752 vehicles 1983 591 vehicles 1982 536 vehicles 1981 533 vehicles 1980 1,206 vehicles