2002 1,791 vehicles 2001 2,697 vehicles 2000 3,702 vehicles 1999 4,858 vehicles 1998 6,327 vehicles 1997 4,940 vehicles 1996 3,356 vehicles 1995 2,147 vehicles 1994 2,430 vehicles 1993 2,401 vehicles 1992 2,182 vehicles 1991 1,289 vehicles 1990 1,310 vehicles 1989 1,252 vehicles 1988 673 vehicles 1987 212 vehicles 1986 114 vehicles