2011 1,841 vehicles 2010 2,801 vehicles 2009 1,967 vehicles 2008 3,082 vehicles 2007 2,502 vehicles 2006 3,436 vehicles 2005 4,485 vehicles 2004 1,239 vehicles 2003 938 vehicles 2002 308 vehicles 2001 1,052 vehicles 2000 1,479 vehicles 1999 1,180 vehicles 1998 1,038 vehicles 1997 334 vehicles 1996 1,221 vehicles 1995 644 vehicles 1994 617 vehicles 1993 578 vehicles 1992 552 vehicles 1991 585 vehicles 1990 457 vehicles 1989 253 vehicles 1988 155 vehicles