Year	Percent
1995-01-01	35.1760089303918
1996-01-01	35.3283559824850
1997-01-01	35.1295074089657
1998-01-01	34.8755902214328
1999-01-01	34.4721682863497
2000-01-01	34.2394498648395
2001-01-01	34.0943509531077
2002-01-01	33.1409218375367
2003-01-01	32.4407085484645
2004-01-01	32.5141309319433
2005-01-01	32.8590548930590
2006-01-01	32.9828302263228
2007-01-01	32.5583785745326
2008-01-01	32.4413415417097
2009-01-01	32.9092551850051
2010-01-01	33.0868701200873
2011-01-01	33.2950333222190
2012-01-01	33.4970442409836
2013-01-01	33.5444846988512
2014-01-01	34.0098019814411
2015-01-01	34.1600331312484
2016-01-01	34.2944672270121
2017-01-01	34.2420062865988