Year	Percent
1992-01-01	61.58730000000000
1993-01-01	63.17160000000000
1994-01-01	66.51260000000000
1995-01-01	55.04110000000000
1996-01-01	51.97410000000000
1997-01-01	54.52000000000000
1998-01-01	48.17870000000000
1999-01-01	41.51510000000000
2000-01-01	45.93250000000000
2001-01-01	55.54610000000000
2002-01-01	65.52240000000000
2003-01-01	75.23610000000000
2004-01-01	81.77060000000000
2005-01-01	89.39160000000000
2006-01-01	95.13510000000000
2007-01-01	97.22950000000000
2008-01-01	97.31380000000000
2009-01-01	94.95200000000001
2010-01-01	92.28299999999999
2011-01-01	91.16360000000000
2012-01-01	89.50020000000000
2013-01-01	87.84700000000001
2014-01-01	82.30290000000000
2015-01-01	75.60000000000000
2016-01-01	74.83310000000000