Year	Percent
1999-01-01	46.4880749744678
2000-01-01	47.2947463044347
2001-01-01	46.7688339336938
2002-01-01	46.3910318703766
2003-01-01	45.7271704592552
2004-01-01	46.2897479412358
2005-01-01	46.5511719051716
2006-01-01	46.3313939844632
2007-01-01	47.0241642579164
2008-01-01	46.9077615160766
2009-01-01	45.9114247942265
2010-01-01	46.0278477906352
2011-01-01	45.6768865234309
2012-01-01	45.4286165679650
2013-01-01	44.8741430530362
2014-01-01	44.3546195350990