Year	Percent
1996-01-01	3.0495099999999997
1997-01-01	1.2991100000000000
1998-01-01	1.9123299999999999
1999-01-01	1.5150800000000000
2000-01-01	2.0263100000000000
2001-01-01	3.1581500000000000
2002-01-01	3.5913300000000000
2003-01-01	3.2168500000000000
2004-01-01	3.8764900000000000
2005-01-01	3.8796199999999996
2006-01-01	3.7315800000000000
2007-01-01	3.6503500000000000
2008-01-01	3.1990000000000000
2009-01-01	2.4191800000000000
2010-01-01	2.2641600000000000
2011-01-01	2.4266500000000000
2012-01-01	2.8199500000000000
2013-01-01	3.2269099999999997
2014-01-01	3.1958900000000003
2015-01-01	3.2603000000000000
2016-01-01	3.8248900000000003