Year	Percent
1996-01-01	10.52630
1997-01-01	30.90280
1998-01-01	19.82180
1999-01-01	4.08805
2000-01-01	12.92880
2001-01-01	29.77640
2002-01-01	25.91840
2003-01-01	23.97600
2004-01-01	22.21670
2005-01-01	19.47980
2006-01-01	22.68960
2007-01-01	58.56350
2008-01-01	55.64600
2009-01-01	54.32550
2010-01-01	49.15360
2011-01-01	51.72640
2012-01-01	44.45870
2013-01-01	47.48720
2014-01-01	48.25710