Year	Index
2003-01-01	31.8
2004-01-01	33.3
2005-01-01	32.4
2006-01-01	33.5
2007-01-01	34.1
2008-01-01	34.2
2009-01-01	34.9
2010-01-01	35.2
2011-01-01	35.7
2012-01-01	35.4
2013-01-01	36.2
2014-01-01	36.1
2015-01-01	36.2