Year	Percent
2000-01-01	61.2014935405539
2001-01-01	61.4903355120820
2002-01-01	62.0893981949371
2003-01-01	61.5934155183741
2004-01-01	62.3302697849406
2005-01-01	62.2203559303153
2006-01-01	62.1853627087522
2007-01-01	62.1518060865222
2008-01-01	61.7223842538688
2009-01-01	60.9942895903735
2010-01-01	61.1299703431998
2011-01-01	61.3438874843882
2012-01-01	61.5923400994487
2013-01-01	61.7126454532092
2014-01-01	62.7062901249242
2015-01-01	62.7971634253168
2016-01-01	62.8769094615445
2017-01-01	63.1622165739237