Year	Percent
1996-01-01	39.3183
1997-01-01	33.7069
1998-01-01	37.0732
1999-01-01	37.5845
2000-01-01	49.2868
2001-01-01	42.9379
2002-01-01	34.3960
2003-01-01	32.6335
2004-01-01	45.0845
2005-01-01	48.6131
2006-01-01	50.9506
2007-01-01	38.2421
2008-01-01	37.7191
2009-01-01	37.9931
2010-01-01	36.5893
2011-01-01	32.5942
2012-01-01	35.0274
2013-01-01	34.0829
2014-01-01	34.2192