Year	Percent
1995-01-01	36.8416581963840
1996-01-01	37.7593826988842
1997-01-01	38.5327952555354
1998-01-01	38.1925593132833
1999-01-01	36.5414114991900
2000-01-01	35.6141117035219
2001-01-01	35.3414020495993
2002-01-01	33.4738666735416
2003-01-01	32.6682952908073
2004-01-01	33.1596027742117
2005-01-01	34.1341950643343
2006-01-01	33.7660630244588
2007-01-01	33.0219764118652
2008-01-01	32.6572317927946
2009-01-01	34.6617806910357
2010-01-01	35.5090906637346
2011-01-01	35.4828293124275
2012-01-01	36.4902361886995
2013-01-01	36.1711838650098
2014-01-01	35.8028426720925
2015-01-01	35.7633677905257
2016-01-01	36.2674866009827
2017-01-01	36.0857339567180