Year	Percent
1983-01-01	2.6731700000000003
1984-01-01	2.4209900000000000
1985-01-01	2.7697400000000000
1986-01-01	1.7679099999999999
1987-01-01	1.6878799999999998
1988-01-01	0.9174170000000000
1989-01-01	0.8411110000000000
1990-01-01	0.7093800000000000
1991-01-01	0.4465640000000000
1992-01-01	0.5660330000000000
1993-01-01	0.7188540000000000
1994-01-01	0.6859109999999999
1995-01-01	0.9665819999999999
1996-01-01	0.8892150000000000
1997-01-01	1.7567700000000002
1998-01-01	1.6756400000000002
1999-01-01	2.9210000000000003
2000-01-01	4.4812300000000000
2001-01-01	5.0815800000000010
2002-01-01	7.2974600000000010
2003-01-01	9.6569300000000010
2004-01-01	9.9856300000000000
2005-01-01	9.0955200000000000
2006-01-01	11.9005000000000000
2007-01-01	11.6669000000000000
2008-01-01	9.1043300000000010
2009-01-01	9.0450900000000000
2010-01-01	11.1136000000000000
2011-01-01	8.7093899999999990
2012-01-01	8.9820300000000000
2013-01-01	7.6364399999999995
2014-01-01	7.4521899999999990
2015-01-01	9.7322300000000000
2016-01-01	10.6634000000000000