Year	Index
1998-01-01	0.51148300000000000
1999-01-01	0.37027200000000000
2000-01-01	0.30722400000000000
2001-01-01	0.30456100000000000
2002-01-01	0.31206100000000003
2003-01-01	0.29853800000000000
2004-01-01	0.27831800000000000
2005-01-01	0.31854000000000000
2006-01-01	0.33101800000000000
2007-01-01	0.26618600000000003
2008-01-01	0.25420900000000000
2009-01-01	0.22353200000000000
2010-01-01	0.23581500000000000
2011-01-01	0.25943400000000000
2012-01-01	0.28058099999999997
2013-01-01	0.31135999999999997
2014-01-01	0.35615399999999997