Year	Percent
1999-01-01	19.2871
2000-01-01	20.3044
2001-01-01	24.2607
2002-01-01	35.1558
2003-01-01	34.8690
2004-01-01	44.5675
2005-01-01	50.6014
2006-01-01	55.5583
2007-01-01	62.8128
2008-01-01	56.1721
2009-01-01	55.8055
2010-01-01	48.7982
2011-01-01	67.6163
2012-01-01	65.2471
2013-01-01	62.5440
2014-01-01	62.8472
2015-01-01	64.5769
2016-01-01	57.0835