Year	Percent
1996-01-01	40.8757
1997-01-01	32.3241
1998-01-01	17.9567
1999-01-01	24.6877
2000-01-01	26.6616
2001-01-01	32.4649
2002-01-01	37.8103
2003-01-01	31.7408
2004-01-01	37.4765
2005-01-01	37.6001
2006-01-01	44.5456
2007-01-01	48.1897
2008-01-01	51.4511
2009-01-01	51.8571
2010-01-01	42.0638
2011-01-01	40.4854
2012-01-01	34.2798
2013-01-01	30.8199
2014-01-01	25.7625
2015-01-01	26.9469
2016-01-01	27.9293