Year	Percent
1995-01-01	53.3420163171105
1996-01-01	53.6413776088420
1997-01-01	55.1820468118839
1998-01-01	54.7893165048522
1999-01-01	56.5360440448945
2000-01-01	57.3792892151494
2001-01-01	57.2875264846108
2002-01-01	58.9984720224473
2003-01-01	60.9086017868770
2004-01-01	61.8976695180881
2005-01-01	63.0747144113428
2006-01-01	62.6408454549803
2007-01-01	63.4858192602022
2008-01-01	62.9697959485387
2009-01-01	61.8209274834095
2010-01-01	62.9133276271434
2011-01-01	63.1908279382824
2012-01-01	63.9970183865253
2013-01-01	64.6575150039018
2014-01-01	64.9578564478386
2015-01-01	66.0343174096650
2016-01-01	66.4190798266502
2017-01-01	66.5936631081091