Year	Percent
1995-01-01	8.32188325335501
1996-01-01	7.81019448573972
1997-01-01	7.61348526992811
1998-01-01	6.86927046037548
1999-01-01	5.96112109764810
2000-01-01	5.47607012503674
2001-01-01	5.82418351350595
2002-01-01	6.26652196368948
2003-01-01	6.28075246799852
2004-01-01	5.92705448980105
2005-01-01	5.37883055827352
2006-01-01	5.23362703477897
2007-01-01	5.06893312450088
2008-01-01	5.36872583736286
2009-01-01	6.96636026488149
2010-01-01	6.60246974943303
2011-01-01	6.63092439334200
2012-01-01	6.20843231814293
2013-01-01	6.33478261178234
2014-01-01	6.15713815631506
2015-01-01	6.08230683796039
2016-01-01	6.36514661237001
2017-01-01	5.78142678648188