Year	Percent
1999-01-01	25.2865
2000-01-01	31.0554
2001-01-01	40.2124
2002-01-01	53.4581
2003-01-01	56.0119
2004-01-01	57.5076
2005-01-01	56.1749
2006-01-01	62.1450
2007-01-01	70.0212
2008-01-01	73.4573
2009-01-01	98.4519
2010-01-01	83.1628
2011-01-01	57.0796
2012-01-01	57.7578
2013-01-01	56.0751
2014-01-01	56.2923
2015-01-01	57.6647
2016-01-01	46.0109