Year Age 1990 19000 1991 21000 1992 24000 1993 26000 1994 27000 1995 28000 1996 29000 1997 29000 1998 30000 1999 28000 2000 28000 2001 28000 2002 27000 2003 26000 2004 23000 2005 21000 2006 20000 2007 18000 2008 17000 2009 15000 2010 14000 2011 13000