Year	Percent
1998-01-01	78.0000
1999-01-01	79.3000
2000-01-01	74.1000
2001-01-01	61.7000
2002-01-01	78.3000
2003-01-01	89.4000
2004-01-01	99.1000
2005-01-01	98.8000
2006-01-01	116.6000
2007-01-01	129.8000
2008-01-01	46.2000
2009-01-01	32.8000
2010-01-01	40.4920
2011-01-01	66.0829
2012-01-01	71.6824
2013-01-01	73.6394
2014-01-01	77.1504
2015-01-01	77.7974
2016-01-01	89.3176