Year	Percent
1996-01-01	36.5541
1997-01-01	37.2967
1998-01-01	46.1659
1999-01-01	40.3534
2000-01-01	35.5905
2001-01-01	36.1348
2002-01-01	39.5300
2003-01-01	60.3637
2004-01-01	65.1598
2005-01-01	58.5713
2006-01-01	51.8662
2007-01-01	49.5350
2008-01-01	45.7424
2009-01-01	45.5999
2010-01-01	49.1332
2011-01-01	45.3676
2012-01-01	50.5029
2013-01-01	45.3095
2014-01-01	47.2230