2006 206 vehicles 2005 273 vehicles 2004 358 vehicles 2003 482 vehicles 2002 598 vehicles 2001 561 vehicles 2000 626 vehicles 1999 682 vehicles 1998 686 vehicles 1997 643 vehicles 1996 787 vehicles 1995 1,055 vehicles 1994 889 vehicles 1993 788 vehicles 1992 920 vehicles 1991 631 vehicles 1990 1,148 vehicles 1989 2,161 vehicles 1988 2,198 vehicles 1987 1,742 vehicles 1986 1,575 vehicles 1985 1,668 vehicles 1984 1,525 vehicles 1983 1,548 vehicles 1982 1,751 vehicles 1981 2,078 vehicles 1980 3,137 vehicles