Year	Percent
1996-01-01	23.45780
1997-01-01	24.36390
1998-01-01	19.47190
1999-01-01	9.16410
2000-01-01	9.77955
2001-01-01	13.90280
2002-01-01	10.78410
2003-01-01	10.45470
2004-01-01	9.46515
2005-01-01	7.07183
2006-01-01	10.50840
2007-01-01	16.24380
2008-01-01	14.67170
2009-01-01	18.33640
2010-01-01	35.97280
2011-01-01	34.98240
2012-01-01	36.94220
2013-01-01	37.69090
2014-01-01	39.47560
2015-01-01	38.25170
2016-01-01	33.49560