Year	Percent
1982-01-01	1.3952900000000000
1983-01-01	1.6172600000000001
1984-01-01	2.1075900000000000
1985-01-01	2.5553900000000000
1986-01-01	2.9580599999999997
1987-01-01	3.4166199999999995
1988-01-01	3.5965100000000000
1989-01-01	3.4599400000000000
1990-01-01	3.1178400000000000
1991-01-01	2.9576400000000000
1992-01-01	2.8499100000000000
1993-01-01	2.8171000000000000
1994-01-01	2.5804400000000003
1995-01-01	2.4937300000000000
1996-01-01	3.4252300000000004
1997-01-01	3.7976000000000000
1998-01-01	4.2286199999999990
1999-01-01	3.2388900000000000
2000-01-01	3.0678000000000000
2001-01-01	2.2679500000000000
2002-01-01	1.4520300000000000
2003-01-01	1.1369500000000000
2004-01-01	0.9647280000000000
2005-01-01	0.8038310000000001
2006-01-01	0.7394830000000000
2007-01-01	0.6529699999999999
2008-01-01	0.5373470000000000
2009-01-01	0.8175910000000000
2010-01-01	1.3154900000000000