Year	Percent
1991-01-01	10.47599983215330
1992-01-01	10.29199981689450
1993-01-01	11.14999961853030
1994-01-01	8.06900024414063
1995-01-01	7.10200023651123
1996-01-01	17.07099914550780
1997-01-01	11.24199962615970
1998-01-01	11.12100028991700
1999-01-01	19.73100090026860
2000-01-01	15.98499965667720
2001-01-01	15.99600028991700
2002-01-01	16.77000045776370
2003-01-01	13.31400012969970
2004-01-01	11.95899963378910
2005-01-01	10.27099990844730
2006-01-01	11.31700038909910
2007-01-01	10.39000034332280
2008-01-01	9.55700016021729
2009-01-01	11.86499977111820
2010-01-01	10.61699962615970
2011-01-01	11.39799976348880
2012-01-01	10.06200027465820
2013-01-01	9.48799991607666
2014-01-01	11.10099983215330
2015-01-01	10.93099975585940
2016-01-01	11.45800018310550
2017-01-01	10.69299983978270