Year	Index
1999-01-01	36.2
2001-01-01	35.4
2002-01-01	34.8
2003-01-01	33
2004-01-01	37.5
2005-01-01	36
2006-01-01	29.7
2007-01-01	31.2
2008-01-01	29.2
2009-01-01	28
2010-01-01	30
2011-01-01	29.4
2012-01-01	29.6
2013-01-01	30.6
2014-01-01	31.5
2015-01-01	32.4
2016-01-01	32.5