Year	Percent
1999-01-01	100.0000
2000-01-01	100.0000
2001-01-01	99.3979
2002-01-01	99.8137
2003-01-01	94.4475
2004-01-01	91.4774
2005-01-01	88.3483
2006-01-01	87.3733
2007-01-01	83.8875
2008-01-01	90.3305
2009-01-01	82.9844
2010-01-01	80.1777
2011-01-01	74.4277
2012-01-01	78.5094
2013-01-01	79.3959
2014-01-01	82.0791
2015-01-01	69.1773
2016-01-01	70.3079