Year	Percent
1998-01-01	5.900000000000000
1999-01-01	6.000000000000000
2000-01-01	7.500000000000000
2001-01-01	5.900000000000000
2002-01-01	6.100000000000000
2003-01-01	7.400000000000000
2004-01-01	8.000000000000000
2005-01-01	9.000000000000000
2006-01-01	9.200000000000000
2007-01-01	9.800000000000000
2008-01-01	10.100000000000000
2009-01-01	8.400000000000000
2010-01-01	8.526940000000000
2011-01-01	7.836670000000000
2012-01-01	7.806760000000001
2013-01-01	8.523110000000000
2014-01-01	9.212130000000000
2015-01-01	10.033900000000000
2016-01-01	10.457800000000000