Year	Percent
1995-01-01	43.1855050572599
1996-01-01	43.4709318355076
1997-01-01	44.4940794382265
1998-01-01	45.3128280871854
1999-01-01	46.7507206868087
2000-01-01	48.0969865313173
2001-01-01	48.1877776085265
2002-01-01	50.0254677432879
2003-01-01	53.0261432737209
2004-01-01	53.9077740485720
2005-01-01	54.8005088321577
2006-01-01	55.5346947493374
2007-01-01	56.9898611715276
2008-01-01	57.2216291583279
2009-01-01	57.2841833877455
2010-01-01	58.0539371265943
2011-01-01	58.3942238317665
2012-01-01	59.4038968145909
2013-01-01	60.3104654376559
2014-01-01	60.4317562661926
2015-01-01	60.8650984516263
2016-01-01	61.6301463980468
2017-01-01	62.1917109067252