Year	Percent
2001-01-01	58.8547
2002-01-01	53.1237
2003-01-01	61.5329
2004-01-01	62.9805
2005-01-01	64.7473
2006-01-01	66.8330
2007-01-01	76.8187
2008-01-01	74.4491
2009-01-01	69.5703
2010-01-01	72.3740
2011-01-01	68.9037
2012-01-01	72.0765
2013-01-01	69.0339
2014-01-01	72.3151
2015-01-01	73.5785
2016-01-01	74.5417