Year	Percent
1997-01-01	0.19045700000000000
1998-01-01	0.12548800000000002
1999-01-01	0.09454600000000000
2000-01-01	0.16190100000000000
2001-01-01	0.43159300000000000
2002-01-01	0.65270500000000000
2003-01-01	1.59523000000000000
2004-01-01	2.01655999999999970
2005-01-01	2.00610000000000000
2006-01-01	3.77786000000000000
2007-01-01	6.05727000000000000
2008-01-01	4.66435000000000000
2009-01-01	2.00189000000000000
2010-01-01	0.58653800000000000
2011-01-01	0.78653900000000000
2012-01-01	0.69523000000000000