Year	Percent
1992-01-01	4.2540100000000000
1993-01-01	4.1928300000000010
1994-01-01	4.2972100000000000
1995-01-01	4.4787700000000000
1996-01-01	4.7093099999999990
1997-01-01	4.9772500000000000
1998-01-01	5.3521300000000010
1999-01-01	5.1892400000000000
2000-01-01	5.4161800000000010
2001-01-01	5.5080200000000000
2002-01-01	4.9363500000000000
2003-01-01	5.0071200000000000
2004-01-01	4.9559400000000000
2005-01-01	4.6519200000000000
2006-01-01	4.6274400000000000
2007-01-01	4.6120000000000000
2008-01-01	4.4371700000000000
2009-01-01	4.2546000000000000
2010-01-01	3.3884900000000000
2011-01-01	3.4321300000000003
2012-01-01	2.9480100000000000
2013-01-01	2.8984300000000000
2014-01-01	2.5690800000000000
2015-01-01	2.1012600000000000
2016-01-01	1.9924099999999998