Year	Percent
1975-01-01	1.69495999999999980
1976-01-01	1.95852000000000000
1977-01-01	2.63746000000000000
1978-01-01	2.48547000000000030
1979-01-01	2.15663000000000000
1980-01-01	1.94913000000000000
1981-01-01	1.67091000000000000
1982-01-01	1.89714000000000000
1983-01-01	2.25400000000000000
1984-01-01	3.37851000000000000
1985-01-01	4.12229000000000050
1986-01-01	3.56176000000000000
1987-01-01	3.50799000000000000
1988-01-01	2.56943000000000000
1989-01-01	2.03010999999999960
1990-01-01	1.93392000000000000
1991-01-01	1.94209000000000000
1992-01-01	1.76783000000000000
1993-01-01	1.52595000000000000
1994-01-01	1.51651000000000000
1995-01-01	1.32633000000000000
1996-01-01	1.24838999999999990
1997-01-01	1.17590000000000000
1998-01-01	1.02752000000000000
1999-01-01	1.32706000000000010
2000-01-01	1.37099000000000000
2001-01-01	0.95214100000000000
2002-01-01	0.92496800000000000
2003-01-01	1.36327999999999980
2004-01-01	1.23047000000000020
2005-01-01	0.67590000000000000
2006-01-01	0.50620000000000000
2007-01-01	0.35471800000000000
2008-01-01	0.30415900000000000
2009-01-01	0.30696700000000000
2010-01-01	0.23355800000000000
2011-01-01	0.38647800000000004
2012-01-01	0.58736000000000000
2013-01-01	0.69691100000000000
2014-01-01	0.95367700000000000
2015-01-01	1.11530000000000000
2016-01-01	1.25024000000000000