Year	Percent
1991-01-01	90.48160000000000
1992-01-01	103.97399999999999
1993-01-01	105.14700000000000
1994-01-01	95.99900000000000
1995-01-01	59.48730000000000
1996-01-01	54.42530000000000
1997-01-01	33.92390000000000
1998-01-01	15.03360000000000
1999-01-01	15.97860000000000
2000-01-01	15.32530000000000
2001-01-01	16.56980000000000
2002-01-01	20.96980000000000
2003-01-01	26.66240000000000
2004-01-01	33.74790000000000
2005-01-01	40.01230000000000
2006-01-01	44.61530000000000
2007-01-01	51.97060000000000
2008-01-01	65.16810000000000
2009-01-01	72.94050000000000
2010-01-01	72.53600000000000
2011-01-01	70.02700000000000
2012-01-01	71.62650000000000
2013-01-01	73.07820000000000
2014-01-01	70.70560000000000
2015-01-01	66.00110000000000
2016-01-01	62.92590000000000