Year	Percent
1997-01-01	0.12881099999999998
1998-01-01	0.14453000000000000
1999-01-01	0.15129200000000000
2000-01-01	0.18237100000000000
2001-01-01	0.22296000000000000
2002-01-01	0.31023800000000000
2003-01-01	0.44302299999999994
2004-01-01	0.50970900000000000
2005-01-01	0.51741600000000000
2006-01-01	0.67387299999999990
2007-01-01	0.97793500000000000
2008-01-01	0.95655100000000000
2009-01-01	1.20337000000000000
2010-01-01	1.67213000000000000
2011-01-01	2.06800999999999970