2011 452 vehicles 2010 844 vehicles 2009 606 vehicles 2008 596 vehicles 2007 1,107 vehicles 2006 2,455 vehicles 2005 8,785 vehicles 2004 9,747 vehicles 2003 10,602 vehicles 2002 6,747 vehicles 2001 3,624 vehicles 2000 1,956 vehicles 1999 1,030 vehicles 1998 436 vehicles