Year	Percent
1996-01-01	52.2383
1997-01-01	83.3693
1998-01-01	53.4356
1999-01-01	34.7446
2000-01-01	30.5395
2001-01-01	43.6669
2002-01-01	46.7386
2003-01-01	47.6328
2004-01-01	45.7882
2005-01-01	52.1437
2006-01-01	59.5821
2007-01-01	74.0068
2008-01-01	80.0565
2009-01-01	77.4790
2010-01-01	68.1529
2011-01-01	69.1053
2012-01-01	68.1345
2013-01-01	75.8541
2014-01-01	63.9411