Year	Percent
1996-01-01	2.8697300000000000
1997-01-01	2.9627400000000000
1998-01-01	2.3583700000000000
1999-01-01	2.0597000000000000
2000-01-01	4.4071600000000000
2001-01-01	3.7959000000000000
2002-01-01	4.1583700000000000
2003-01-01	3.6346600000000000
2004-01-01	3.3032300000000000
2005-01-01	2.7766700000000000
2006-01-01	2.8969500000000000
2007-01-01	3.1684400000000004
2008-01-01	2.9249500000000000
2009-01-01	2.9640100000000000
2010-01-01	3.1965600000000000
2011-01-01	3.4644199999999996
2012-01-01	3.2713500000000000
2013-01-01	3.3988099999999997
2014-01-01	3.3131600000000000
2015-01-01	3.0246000000000000
2016-01-01	2.8062800000000000