Year	Percent
1990-01-01	1.9062100000000000
1991-01-01	1.4955900000000000
1992-01-01	1.6405000000000000
1993-01-01	1.8179599999999998
1994-01-01	1.9208100000000000
1995-01-01	1.6191700000000000
1996-01-01	1.6444900000000002
1997-01-01	1.5704900000000000
1998-01-01	1.5738000000000000
1999-01-01	1.6066400000000000
2000-01-01	1.7907900000000000
2001-01-01	1.7247500000000000
2002-01-01	1.8051000000000000
2003-01-01	1.5868600000000000
2004-01-01	1.6582100000000000
2005-01-01	1.6026100000000000
2006-01-01	1.5339300000000000
2007-01-01	1.6548100000000000
2008-01-01	1.8642400000000001
2009-01-01	1.8000700000000000
2010-01-01	1.7111299999999998
2011-01-01	1.5995200000000000
2012-01-01	1.6408400000000000
2013-01-01	1.6135100000000000
2014-01-01	1.7562799999999998
2015-01-01	1.4325100000000000
2016-01-01	1.4847500000000000