2000 291 vehicles 1999 963 vehicles 1998 1,708 vehicles 1997 2,587 vehicles 1996 1,832 vehicles 1995 1,301 vehicles 1994 1,083 vehicles 1993 793 vehicles 1992 602 vehicles 1991 454 vehicles 1990 537 vehicles 1989 438 vehicles 1988 108 vehicles