Year	Percent
1990-01-01	0.27321500000000000
1991-01-01	0.56166900000000000
1992-01-01	1.03912000000000000
1993-01-01	1.16660000000000000
1994-01-01	0.89037000000000010
1995-01-01	1.01857000000000000
1996-01-01	1.01121000000000000
1997-01-01	0.71006400000000000
1998-01-01	0.57030600000000010
1999-01-01	0.45933599999999997
2000-01-01	0.42766899999999997
2001-01-01	0.39174699999999996
2002-01-01	0.38407600000000003
2003-01-01	0.40574400000000000
2004-01-01	0.48685200000000006
2005-01-01	0.91003799999999990
2006-01-01	1.65340000000000000
2007-01-01	2.60680000000000000
2008-01-01	3.10855000000000000
2009-01-01	3.96390000000000000
2010-01-01	5.16766999999999900
2011-01-01	4.88603000000000000