Year	Percent
1991-01-01	9.27421000000000
1992-01-01	10.48810000000000
1993-01-01	17.73180000000000
1994-01-01	41.63260000000000
1995-01-01	59.04470000000000
1996-01-01	78.99570000000000
1997-01-01	74.39380000000000
1998-01-01	98.17960000000000
1999-01-01	121.03299999999999
2000-01-01	99.70090000000000
2001-01-01	95.52380000000000
2002-01-01	92.64660000000000
2003-01-01	94.21360000000000
2004-01-01	89.90050000000000
2005-01-01	81.28160000000000
2006-01-01	82.36620000000000
2007-01-01	90.92150000000000
2008-01-01	95.25340000000000
2009-01-01	93.26140000000000
2010-01-01	90.08890000000000
2011-01-01	90.48800000000000
2012-01-01	92.15700000000001
2013-01-01	90.31970000000000
2014-01-01	83.69800000000000
2015-01-01	79.88380000000000
2016-01-01	74.17360000000000