2003 6,528 vehicles 2002 17,111 vehicles 2001 25,321 vehicles 2000 23,389 vehicles 1999 22,255 vehicles 1998 46,422 vehicles 1997 44,966 vehicles 1996 36,383 vehicles 1995 33,793 vehicles 1994 30,294 vehicles 1993 21,047 vehicles 1992 10,152 vehicles 1991 1,001 vehicles