Year	Percent
1980-01-01	7.54000000000000000
1981-01-01	8.19333000000000000
1982-01-01	5.28750000000000000
1983-01-01	4.43333000000000100
1984-01-01	4.77500000000000000
1985-01-01	5.15000000000000000
1986-01-01	4.69583000000000000
1987-01-01	4.59167000000000000
1988-01-01	4.29583000000000050
1989-01-01	7.25833000000000000
1990-01-01	8.43750000000000000
1991-01-01	9.21250000000000000
1992-01-01	9.54583000000000000
1993-01-01	7.28333000000000000
1994-01-01	3.59166999999999970
1995-01-01	2.81250000000000000
1996-01-01	2.35417000000000000
1997-01-01	2.95000000000000000
1998-01-01	3.39583000000000000
1999-01-01	0.71666700000000000
2000-01-01	1.90417000000000010
2001-01-01	1.89583000000000000
2002-01-01	1.19167000000000000
2003-01-01	0.51250000000000000
2004-01-01	0.44083300000000000
2005-01-01	0.43000000000000000
2006-01-01	0.55946700000000000
2007-01-01	0.71496700000000000
2008-01-01	0.23333299999999998