Year	Percent
1991-01-01	0.7110080000000000
1992-01-01	0.4103140000000000
1993-01-01	0.4923040000000000
1994-01-01	0.5518689999999999
1995-01-01	0.6118540000000000
1996-01-01	0.6799630000000000
1997-01-01	0.7272970000000000
1998-01-01	0.8617469999999999
1999-01-01	1.0335500000000000
2000-01-01	1.3401100000000001
2001-01-01	1.1233799999999998
2002-01-01	1.6115100000000000
2003-01-01	1.1541900000000000
2004-01-01	1.1375400000000000
2005-01-01	1.3451200000000000
2006-01-01	1.7096000000000000
2007-01-01	2.0005700000000000
2008-01-01	1.7188700000000001
2009-01-01	1.5827500000000000
2010-01-01	1.6568000000000000
2011-01-01	1.5808500000000000
2012-01-01	1.4075200000000000
2013-01-01	1.4515400000000000
2014-01-01	1.4205299999999998
2015-01-01	1.3127100000000000
2016-01-01	1.2535399999999999