Year	Percent
1981-01-01	0.8391670000000000
1982-01-01	0.7583330000000000
1983-01-01	0.8141670000000000
1984-01-01	1.2400000000000000
1985-01-01	1.6600000000000000
1986-01-01	1.7500000000000000
1987-01-01	1.9075000000000000
1988-01-01	1.9650000000000000
1989-01-01	4.5625000000000000
1990-01-01	4.1158300000000000
1991-01-01	4.3033300000000000
1992-01-01	4.6358300000000000
1993-01-01	5.1708300000000005
1994-01-01	4.6425000000000000
1995-01-01	4.5616699999999994
1996-01-01	3.8025000000000000
1997-01-01	3.2933300000000000
1998-01-01	3.2933300000000000
1999-01-01	3.4889200000000000
2000-01-01	3.9770800000000004
2001-01-01	3.8478199999999996
2002-01-01	3.3338099999999997
2003-01-01	2.9150000000000000
2004-01-01	2.6636800000000000