Year	Percent
1998-01-01	54.3000
1999-01-01	52.1000
2000-01-01	46.8000
2001-01-01	60.3000
2002-01-01	77.5000
2003-01-01	76.7000
2004-01-01	71.2000
2005-01-01	64.5000
2006-01-01	53.6000
2007-01-01	60.0000
2008-01-01	57.4000
2009-01-01	49.7000
2010-01-01	47.9157
2011-01-01	48.8115
2012-01-01	49.2229
2013-01-01	51.5789
2014-01-01	47.7345
2015-01-01	46.3068
2016-01-01	49.0912