Year	Percent
1996-01-01	63.09480
1997-01-01	4.81754
1998-01-01	28.61360
1999-01-01	6.28061
2000-01-01	29.40510
2001-01-01	4.70426
2002-01-01	12.86770
2003-01-01	13.56140
2004-01-01	22.18310
2005-01-01	26.81600
2006-01-01	35.33080
2007-01-01	32.24460
2008-01-01	43.76770
2009-01-01	33.91180
2010-01-01	31.38840
2011-01-01	35.55870
2012-01-01	52.52810
2013-01-01	45.75040
2014-01-01	42.42600
2015-01-01	43.26800
2016-01-01	37.88280