Year	Percent
1985-01-01	1.7383600000000000
1986-01-01	3.7393699999999996
1987-01-01	4.2682199999999995
1988-01-01	6.1253400000000005
1989-01-01	4.8382600000000000
1990-01-01	3.3177500000000000
1991-01-01	1.8824299999999998
1992-01-01	2.0074000000000000
1993-01-01	2.1749400000000003
1994-01-01	4.2992300000000006
1995-01-01	3.9645000000000000
1996-01-01	3.5360900000000000
1997-01-01	2.7198800000000000
1998-01-01	1.0329899999999999
1999-01-01	1.0329899999999999
2000-01-01	3.1050200000000000
2001-01-01	8.0195600000000000
2002-01-01	7.8260300000000000
2003-01-01	7.6708600000000000
2004-01-01	6.9509399999999990
2005-01-01	9.2855800000000000
2006-01-01	10.0244000000000000
2007-01-01	9.4327800000000010
2008-01-01	9.4043100000000000
2009-01-01	9.3268200000000000
2010-01-01	11.7689000000000000
2011-01-01	11.9923000000000000
2012-01-01	12.3162000000000000
2013-01-01	12.2794000000000000
2014-01-01	12.2573000000000000
2015-01-01	12.2323000000000000
2016-01-01	11.6633000000000000