Year	Percent
1996-01-01	29.6012
1997-01-01	32.5292
1998-01-01	33.2823
1999-01-01	31.7598
2000-01-01	32.2329
2001-01-01	34.9637
2002-01-01	38.5435
2003-01-01	36.5364
2004-01-01	36.9699
2005-01-01	37.1915
2006-01-01	40.0176
2007-01-01	38.2675
2008-01-01	44.9591
2009-01-01	44.6463
2010-01-01	44.0038
2011-01-01	43.2412
2012-01-01	43.0732
2013-01-01	43.0024
2014-01-01	44.7541
2015-01-01	44.7085
2016-01-01	44.0558