Year	Percent
1996-01-01	44.3628
1997-01-01	43.8235
1998-01-01	42.1736
1999-01-01	46.5916
2000-01-01	44.8008
2001-01-01	49.0504
2002-01-01	48.1921
2003-01-01	46.8848
2004-01-01	45.6675
2005-01-01	52.1368
2006-01-01	42.5806
2007-01-01	45.8386
2008-01-01	47.5916
2009-01-01	48.9004
2010-01-01	50.1462
2011-01-01	52.4661
2012-01-01	52.4072
2013-01-01	54.3116
2014-01-01	53.3362