Year	Percent
1996-01-01	2.1553400000000003
1997-01-01	2.3448700000000002
1998-01-01	2.1410299999999998
1999-01-01	1.8341599999999998
2000-01-01	2.0597200000000000
2001-01-01	2.0512300000000000
2002-01-01	2.1344300000000000
2003-01-01	2.1992599999999998
2004-01-01	2.6223400000000003
2005-01-01	4.0209699999999990
2006-01-01	2.8269500000000000
2007-01-01	2.3235600000000000
2008-01-01	1.7264400000000002
2009-01-01	1.2621300000000000
2010-01-01	1.4429100000000001
2011-01-01	1.5915300000000000
2012-01-01	1.6872500000000000
2013-01-01	1.8420299999999998
2014-01-01	2.0224100000000000
2015-01-01	2.1185700000000000
2016-01-01	1.7211299999999998