Year	Percent
1997-01-01	29.47060
1998-01-01	22.94780
1999-01-01	-1.73065
2000-01-01	42.75270
2001-01-01	21.30910
2002-01-01	21.30910
2003-01-01	21.30910
2004-01-01	59.66080
2005-01-01	30.85630
2006-01-01	49.02810
2007-01-01	33.21940
2008-01-01	15.65550
2009-01-01	8.80729
2010-01-01	36.52280
2011-01-01	43.11410
2012-01-01	29.75680
2013-01-01	21.74670
2014-01-01	13.16150
2015-01-01	25.49310
2016-01-01	20.35690