Year	Percent
1991-01-01	5.46700000762939
1992-01-01	5.49900007247925
1993-01-01	5.51900005340576
1994-01-01	5.39099979400635
1995-01-01	5.22499990463257
1996-01-01	5.40500020980835
1997-01-01	5.21099996566772
1998-01-01	5.36299991607666
1999-01-01	5.30499982833862
2000-01-01	5.23000001907349
2001-01-01	5.08400011062622
2002-01-01	4.94199991226196
2003-01-01	4.80299997329712
2004-01-01	4.55000019073486
2005-01-01	4.42600011825562
2006-01-01	4.21500015258789
2007-01-01	4.16200017929077
2008-01-01	3.80999994277954
2009-01-01	3.73099994659424
2010-01-01	3.61100006103516
2011-01-01	4.82000017166138
2012-01-01	4.87900018692017
2013-01-01	4.86600017547607
2014-01-01	4.98400020599365
2015-01-01	4.96199989318848
2016-01-01	5.00199985504150
2017-01-01	5.03900003433228