Year	Percent
1996-01-01	91.56500
1997-01-01	33.23110
1998-01-01	21.57370
1999-01-01	16.58030
2000-01-01	16.17230
2001-01-01	18.21930
2002-01-01	23.85760
2003-01-01	19.79650
2004-01-01	18.13950
2005-01-01	22.60550
2006-01-01	20.87930
2007-01-01	21.52520
2008-01-01	21.52520
2009-01-01	-4.07715
2010-01-01	117.53700
2011-01-01	117.53700
2012-01-01	25.86750
2013-01-01	9.66305
2014-01-01	11.74650
2015-01-01	5.69166
2016-01-01	6.80945