2002 1,344 vehicles 2001 3,611 vehicles 2000 3,688 vehicles 1999 3,231 vehicles 1998 2,614 vehicles 1997 2,361 vehicles 1996 1,885 vehicles 1995 1,156 vehicles 1994 638 vehicles 1993 587 vehicles 1992 599 vehicles 1991 334 vehicles 1990 271 vehicles 1989 225 vehicles 1988 133 vehicles