Year	Percent
1996-01-01	43.7508
1997-01-01	40.7011
1998-01-01	50.4386
1999-01-01	46.3266
2000-01-01	51.2616
2001-01-01	58.1002
2002-01-01	59.6083
2003-01-01	53.2458
2004-01-01	49.7867
2005-01-01	49.5079
2006-01-01	66.6533
2007-01-01	59.6974
2008-01-01	47.7539
2009-01-01	34.3979
2010-01-01	45.4368
2011-01-01	45.8843
2012-01-01	45.4810
2013-01-01	45.3026
2014-01-01	46.6505