Year	Percent
1991-01-01	123.35799999999999
1992-01-01	118.28700000000000
1993-01-01	103.87600000000000
1994-01-01	83.04190000000000
1995-01-01	67.41810000000000
1996-01-01	76.12070000000000
1997-01-01	72.31130000000000
1998-01-01	43.21170000000000
1999-01-01	51.98710000000000
2000-01-01	53.94100000000000
2001-01-01	53.51350000000000
2002-01-01	59.87070000000000
2003-01-01	74.81260000000000
2004-01-01	89.45950000000000
2005-01-01	95.11280000000000
2006-01-01	91.57220000000000
2007-01-01	98.76640000000000
2008-01-01	118.32799999999999
2009-01-01	128.70800000000000
2010-01-01	123.55000000000000
2011-01-01	114.27700000000000
2012-01-01	107.17200000000001
2013-01-01	100.13100000000000
2014-01-01	91.68900000000000
2015-01-01	83.04020000000000
2016-01-01	77.07690000000000