Year	Percent
1996-01-01	100.0000
1997-01-01	80.8264
1998-01-01	79.1307
1999-01-01	63.1842
2000-01-01	66.2070
2001-01-01	81.2846
2002-01-01	87.0806
2003-01-01	83.0965
2004-01-01	82.5056
2005-01-01	68.5469
2006-01-01	63.0451
2007-01-01	57.0027
2008-01-01	47.7723
2009-01-01	42.4963
2010-01-01	42.4609
2011-01-01	38.1760
2012-01-01	38.8081
2013-01-01	40.3162
2014-01-01	45.2043
2015-01-01	48.7428
2016-01-01	54.0047