2010 1,913 vehicles 2009 4,353 vehicles 2008 7,917 vehicles 2007 18,185 vehicles 2006 27,922 vehicles 2005 29,969 vehicles 2004 39,557 vehicles 2003 41,994 vehicles 2002 57,924 vehicles 2001 62,491 vehicles 2000 27,949 vehicles 1999 15,351 vehicles 1998 17,046 vehicles 1997 1,852 vehicles