Year	Percent
2001-01-01	81.67
2002-01-01	81.25
2003-01-01	95.35
2004-01-01	102.92
2005-01-01	114.29
2006-01-01	129.58
2007-01-01	127.40
2008-01-01	114.09
2009-01-01	121.19
2010-01-01	129.23
2011-01-01	133.98
2012-01-01	144.27
2013-01-01	149.97
2014-01-01	153.37
2015-01-01	155.99
2016-01-01	150.74