Year	Percent
1991-01-01	45.26320000000000
1992-01-01	53.34070000000000
1993-01-01	61.21990000000000
1994-01-01	76.83060000000000
1995-01-01	92.53620000000000
1996-01-01	109.85100000000000
1997-01-01	131.12000000000000
1998-01-01	145.45100000000000
1999-01-01	138.56600000000000
2000-01-01	129.68100000000000
2001-01-01	127.59700000000001
2002-01-01	134.08500000000000
2003-01-01	151.43100000000000
2004-01-01	170.52500000000000
2005-01-01	130.60399999999998
2006-01-01	154.78300000000000
2007-01-01	182.81000000000000
2008-01-01	196.19700000000000
2009-01-01	191.60299999999998
2010-01-01	177.07000000000000
2011-01-01	157.78200000000000
2012-01-01	143.15300000000000
2013-01-01	134.40000000000000
2014-01-01	126.19300000000000
2015-01-01	118.68500000000000
2016-01-01	113.58500000000000