Year	Percent
1990-01-01	0.0061080000000000000
1991-01-01	0.0056200000000000000
1992-01-01	0.0049229999999999990
1993-01-01	0.0048020000000000010
1994-01-01	0.0043470000000000000
1995-01-01	0.0041290000000000000
1996-01-01	0.0035420000000000000
1997-01-01	0.0034330000000000000
1998-01-01	0.0035640000000000000
1999-01-01	0.0035770000000000003
2000-01-01	0.0034320000000000000
2001-01-01	0.0031370000000000000
2002-01-01	0.0031250000000000000
2003-01-01	0.0029739999999999996
2004-01-01	0.0026850000000000003
2005-01-01	0.0026850000000000003
2006-01-01	0.0024710000000000000
2007-01-01	0.0034180000000000000
2008-01-01	0.0061960000000000000
2009-01-01	0.0071740000000000000
2010-01-01	0.0098900000000000010
2011-01-01	0.0097460000000000000
2012-01-01	0.0069299999999999995
2013-01-01	0.0051090000000000010
2014-01-01	0.0052480000000000000
2015-01-01	0.0045119999999999995