Year	Percent
1991-01-01	10.94499969482420
1992-01-01	10.90699958801270
1993-01-01	8.91399955749512
1994-01-01	9.01500034332275
1995-01-01	9.54699993133545
1996-01-01	7.75799989700317
1997-01-01	7.62599992752075
1998-01-01	9.89999961853027
1999-01-01	10.72599983215330
2000-01-01	9.50899982452393
2001-01-01	11.09799957275390
2002-01-01	10.90100002288820
2003-01-01	11.37300014495850
2004-01-01	11.23099994659420
2005-01-01	11.28299999237060
2006-01-01	10.63500022888180
2007-01-01	10.80099964141850
2008-01-01	10.73900032043460
2009-01-01	11.64700031280520
2010-01-01	10.82800006866460
2011-01-01	9.90299987792969
2012-01-01	10.10700035095210
2013-01-01	10.07400035858150
2014-01-01	9.86800003051758
2015-01-01	10.77700042724610
2016-01-01	10.72500038146970
2017-01-01	10.84899997711180