Year	Percent
1996-01-01	57.1730
1997-01-01	60.6061
1998-01-01	49.2308
1999-01-01	50.7246
2000-01-01	50.5952
2001-01-01	55.6452
2002-01-01	54.9865
2003-01-01	46.7470
2004-01-01	42.9194
2005-01-01	42.1136
2006-01-01	40.8046
2007-01-01	38.5528
2008-01-01	34.0206
2009-01-01	33.3716
2010-01-01	37.3152
2011-01-01	31.4708
2012-01-01	33.0002
2013-01-01	34.2839
2014-01-01	35.0766