Year	Percent
1996-01-01	4.290360000000000
1997-01-01	4.325810000000000
1998-01-01	8.040289999999999
1999-01-01	14.330000000000000
2000-01-01	16.003800000000000
2001-01-01	12.424200000000000
2002-01-01	10.062400000000000
2003-01-01	12.066600000000000
2004-01-01	15.159700000000000
2005-01-01	18.444400000000000
2006-01-01	24.488800000000000
2007-01-01	30.340900000000000
2008-01-01	27.308300000000000
2009-01-01	22.012300000000000
2010-01-01	20.227800000000000
2011-01-01	21.221900000000000
2012-01-01	34.135500000000000