Year	Percent
1996-01-01	52.1599
1997-01-01	57.7484
1998-01-01	63.2982
1999-01-01	70.9867
2000-01-01	68.1916
2001-01-01	71.5858
2002-01-01	72.3283
2003-01-01	65.7062
2004-01-01	67.0792
2005-01-01	66.4913
2006-01-01	62.0426
2007-01-01	57.9668
2008-01-01	65.4455
2009-01-01	55.3152
2010-01-01	63.6544
2011-01-01	56.9574
2012-01-01	55.4661
2013-01-01	52.6132
2014-01-01	53.3162