Year	Percent
1996-01-01	32.2793
1997-01-01	31.9075
1998-01-01	30.8582
1999-01-01	27.8370
2000-01-01	29.1429
2001-01-01	30.6931
2002-01-01	32.7393
2003-01-01	36.0843
2004-01-01	40.1939
2005-01-01	52.6415
2006-01-01	44.2822
2007-01-01	44.8355
2008-01-01	35.0289
2009-01-01	33.1184
2010-01-01	30.4658
2011-01-01	26.2527
2012-01-01	28.0287
2013-01-01	30.0599
2014-01-01	31.1714