Year	Percent
1980-01-01	2.22503000000000000
1981-01-01	1.67465000000000000
1982-01-01	1.21177000000000000
1983-01-01	0.82883400000000000
1984-01-01	0.71414800000000000
1985-01-01	0.72923700000000000
1986-01-01	0.47540400000000000
1987-01-01	0.51444899999999990
1988-01-01	0.09734500000000000
1989-01-01	0.09734500000000000
1990-01-01	0.09734500000000000
1991-01-01	0.09734500000000000
1992-01-01	0.09734500000000000
1993-01-01	0.09734500000000000
1994-01-01	0.09734500000000000
1995-01-01	0.09734500000000000
1996-01-01	0.09734500000000000
1997-01-01	0.09734500000000000
1998-01-01	0.09734500000000000
1999-01-01	0.09734500000000000
2000-01-01	0.09734500000000000
2001-01-01	0.30520100000000000
2002-01-01	0.30247700000000000
2003-01-01	0.31155400000000000
2004-01-01	0.28007300000000000
2005-01-01	0.24830500000000003
2006-01-01	0.22577900000000000
2007-01-01	0.20274200000000000
2008-01-01	0.21685900000000002
2009-01-01	0.20546900000000000