Year	Percent
1998-01-01	2.80000
1999-01-01	3.90000
2000-01-01	4.60000
2001-01-01	4.80000
2002-01-01	7.20000
2003-01-01	7.00000
2004-01-01	8.00000
2005-01-01	9.30000
2006-01-01	9.30000
2007-01-01	9.30000
2008-01-01	6.30000
2009-01-01	7.30000
2010-01-01	7.59542
2011-01-01	8.11365
2012-01-01	8.23126
2013-01-01	8.27255
2014-01-01	8.13114