Year	Percent
2000-01-01	47.9913409560430
2001-01-01	47.8099358894435
2002-01-01	47.6327121360216
2003-01-01	45.4063149306212
2004-01-01	46.4383457903849
2005-01-01	45.7877404374543
2006-01-01	46.4694777609190
2007-01-01	46.8819456249056
2008-01-01	47.2906059060816
2009-01-01	46.6329620081716
2010-01-01	47.0490629149873
2011-01-01	48.1504762926245
2012-01-01	49.4240186965364
2013-01-01	50.8365272948588
2014-01-01	52.1498878553411
2015-01-01	53.2230887202043
2016-01-01	53.5823038013652
2017-01-01	54.7781815372714