Year	Percent
1996-01-01	52.2873
1997-01-01	51.7540
1998-01-01	68.1866
1999-01-01	68.3942
2000-01-01	58.1838
2001-01-01	48.7936
2002-01-01	47.7584
2003-01-01	48.5353
2004-01-01	51.1899
2005-01-01	66.1744
2006-01-01	83.2474
2007-01-01	83.6185
2008-01-01	72.7120
2009-01-01	70.9055
2010-01-01	62.1979
2011-01-01	57.5609
2012-01-01	57.8830
2013-01-01	55.6391
2014-01-01	65.8906
2015-01-01	70.7062
2016-01-01	78.6937