Year	Percent
1991-01-01	6.291670000000000
1992-01-01	7.307500000000000
1993-01-01	8.615000000000000
1994-01-01	8.443330000000000
1995-01-01	8.743330000000000
1996-01-01	8.370830000000000
1997-01-01	8.610830000000000
1998-01-01	10.860100000000000
1999-01-01	5.745830000000001
2000-01-01	7.344950000000000
2001-01-01	6.993560000000000
2002-01-01	10.506100000000000
2003-01-01	9.997510000000000
2004-01-01	8.775470000000000
2005-01-01	8.071670000000000
2006-01-01	6.710520000000000
2007-01-01	6.966260000000001
2008-01-01	6.596760000000001
2009-01-01	8.036660000000001
2010-01-01	10.328600000000000
2011-01-01	8.690920000000000
2012-01-01	10.998500000000000
2013-01-01	13.974100000000000
2014-01-01	12.490200000000000
2015-01-01	11.005100000000000
2016-01-01	10.335999999999999