1994 31.1 37.0 41.2 24.1 40.3 1995 31.9 37.7 43.6 22.5 42.1 1996 30.7 38.9 41.5 24.0 41.8 1997 31.8 36.0 43.0 24.8 33.7 1998 16.8 25.0 26.7 20.3 22.9 20.4 1999 11.4 28.9 22.4 18.8 20.2 20.5 2000 22.2 30.6 26.9 21.2 21.6 22.8 2001 22.5 29.2 24.4 19.0 20.3 24.1 2002 21.4 29.2 24.8 17.7 20.1 23.8 2003 25.6 29.9 22.8 16.7 20.2 25.0 2004 24.1 29.9 23.0 16.1 19.8 26.8 2005 25.1 29.7 20.0 14.4 19.4 31.4 2006 25.4 29.6 20.5 14.0 19.7 28.3 2007 24.9 29.4 21.6 14.7 19.5 26.4 2008 27.8 31.2 19.3 14.7 19.3 28.9 2009 31.0 25.9 14.5 14.7 18.6 21.8 2010 30.7 29.4 20.0 15.7 20.2 25.5