Year	Percent
1996-01-01	20.9447
1997-01-01	23.0055
1998-01-01	24.2586
1999-01-01	23.4433
2000-01-01	24.2533
2001-01-01	42.1278
2002-01-01	50.2339
2003-01-01	48.5937
2004-01-01	40.7044
2005-01-01	38.8588
2006-01-01	32.1028
2007-01-01	30.1770
2008-01-01	30.9984
2009-01-01	35.7741
2010-01-01	34.4146
2011-01-01	24.8811
2012-01-01	25.0647
2013-01-01	29.6752
2014-01-01	35.1747