Year	Percent
1995-01-01	9.08140411572462
1996-01-01	9.19521566501954
1997-01-01	9.06290326574303
1998-01-01	8.89474523570544
1999-01-01	8.93647333358255
2000-01-01	8.95718762062965
2001-01-01	8.93401228090946
2002-01-01	8.53588838412348
2003-01-01	8.36073831403657
2004-01-01	8.42655636655112
2005-01-01	8.52401345297571
2006-01-01	8.91215311617658
2007-01-01	8.91876024325023
2008-01-01	8.52068662543148
2009-01-01	9.20351005918712
2010-01-01	9.39464300416948
2011-01-01	9.33913008167841
2012-01-01	9.15864683695299
2013-01-01	9.29993845709169
2014-01-01	9.48580549037754
2015-01-01	9.09814337106355
2016-01-01	9.11054166684976
2017-01-01	8.91478091020216