Year	Percent
1989-01-01	10.8191000000000000
1990-01-01	9.8913400000000000
1991-01-01	11.7466000000000000
1992-01-01	3.6783500000000000
1993-01-01	12.5673000000000000
1994-01-01	9.5000900000000000
1995-01-01	15.3494000000000000
1996-01-01	8.5294900000000000
1997-01-01	6.0684600000000000
1998-01-01	5.0316700000000000
1999-01-01	2.2559800000000000
2000-01-01	4.2409700000000000
2001-01-01	4.5418300000000000
2002-01-01	2.9914000000000000
2003-01-01	4.7378300000000010
2004-01-01	3.8728300000000004
2005-01-01	3.6886300000000003
2006-01-01	2.5417300000000000
2007-01-01	2.2536099999999997
2008-01-01	2.4918000000000000
2009-01-01	2.0144800000000000
2010-01-01	1.1363400000000000
2011-01-01	1.2146600000000000
2012-01-01	0.7608920000000000