Year	Percent
2003-01-01	7.39603591471412
2004-01-01	7.75456114089174
2005-01-01	7.80825922176992
2006-01-01	7.85980120320142
2007-01-01	7.27297073840326
2008-01-01	6.72241100404722
2009-01-01	8.67588568182684
2010-01-01	8.69490401397539
2011-01-01	8.53368443564270
2012-01-01	9.43752000799096
2013-01-01	10.04169373056270
2014-01-01	10.53438106797030
2015-01-01	10.79961509059190
2016-01-01	10.24488874051500
2017-01-01	9.45572336134845