Year	Percent
1992-01-01	1.1669000000000000
1993-01-01	1.9169400000000000
1994-01-01	16.0955000000000000
1995-01-01	26.7799000000000000
1996-01-01	21.2703000000000000
1997-01-01	18.8724000000000000
1998-01-01	16.6785000000000000
1999-01-01	14.3583000000000000
2000-01-01	9.8053300000000000
2001-01-01	6.5934100000000000
2002-01-01	4.9025600000000000
2003-01-01	6.5536800000000000
2004-01-01	6.4093400000000000
2005-01-01	5.2613600000000000
2006-01-01	3.4041099999999997
2007-01-01	6.2300900000000010
2008-01-01	8.8073300000000000
2009-01-01	9.1123000000000000
2010-01-01	8.4772900000000000
2011-01-01	7.6329400000000000
2012-01-01	7.4628900000000000