Year	Percent
1999-01-01	1.24592995643616
2001-01-01	1.24784994125366
2002-01-01	1.30813002586365
2003-01-01	1.31454002857208
2004-01-01	1.28409004211426
2005-01-01	1.28579998016357
2007-01-01	1.26522004604340
2008-01-01	1.29317998886108
2009-01-01	1.32151997089386
2011-01-01	1.31335997581482
2012-01-01	1.34074997901917
2013-01-01	1.35101997852325
2014-01-01	1.35341000556946
2015-01-01	1.39809000492096