Year	Percent
1996-01-01	41.7877
1997-01-01	42.7218
1998-01-01	52.3810
1999-01-01	57.6124
2000-01-01	72.1981
2001-01-01	65.6698
2002-01-01	61.0483
2003-01-01	60.4579
2004-01-01	58.2775
2005-01-01	52.0942
2006-01-01	47.4726
2007-01-01	56.6324
2008-01-01	56.1881
2009-01-01	53.8432
2010-01-01	46.1223
2011-01-01	53.5484
2012-01-01	35.5493
2013-01-01	34.6413
2014-01-01	35.3158