Year	Percent
1996-01-01	35.6271
1997-01-01	34.7915
1998-01-01	36.7363
1999-01-01	34.7054
2000-01-01	35.5949
2001-01-01	34.7950
2002-01-01	34.4544
2003-01-01	33.7738
2004-01-01	33.8895
2005-01-01	35.2149
2006-01-01	40.4138
2007-01-01	39.8596
2008-01-01	32.2124
2009-01-01	44.0448
2010-01-01	36.7090
2011-01-01	34.2950
2012-01-01	35.4962
2013-01-01	37.6610
2014-01-01	38.3088