Year	Percent
1996-01-01	43.2558
1997-01-01	47.8780
1998-01-01	58.0191
1999-01-01	55.6161
2000-01-01	60.8175
2001-01-01	54.2242
2002-01-01	56.1597
2003-01-01	55.7854
2004-01-01	54.4172
2005-01-01	62.6907
2006-01-01	62.1494
2007-01-01	57.1087
2008-01-01	48.9652
2009-01-01	44.3592
2010-01-01	54.0265
2011-01-01	47.0281
2012-01-01	45.3155
2013-01-01	50.1180
2014-01-01	51.1339