Year	Percent
1989-01-01	5.930000000000000
1990-01-01	6.120000000000000
1991-01-01	6.010000000000000
1992-01-01	5.950000000000000
1993-01-01	6.810000000000000
1994-01-01	6.350000000000000
1995-01-01	6.610000000000000
1996-01-01	7.430000000000000
1997-01-01	6.260000000000000
1998-01-01	5.760700000000000
1999-01-01	5.902700000000000
2000-01-01	5.819600000000000
2001-01-01	5.627400000000000
2002-01-01	5.964900000000000
2003-01-01	6.568700000000000
2004-01-01	5.017100000000000
2005-01-01	6.803800000000000
2006-01-01	7.897600000000000
2007-01-01	7.460070000000000
2008-01-01	8.375589999999999
2009-01-01	7.991200000000000
2010-01-01	9.164000000000000
2011-01-01	9.582239999999999
2012-01-01	8.234880000000000
2013-01-01	9.470820000000000
2014-01-01	9.595350000000000
2015-01-01	9.441460000000001
2016-01-01	8.880460000000001