Year	Percent
1980-01-01	1.5143400000000000
1981-01-01	1.8235299999999999
1982-01-01	1.7579500000000000
1983-01-01	2.3235500000000000
1984-01-01	1.6883000000000000
1985-01-01	0.9155700000000001
1986-01-01	0.9528900000000000
1987-01-01	2.4637700000000002
1988-01-01	3.4199900000000003
1989-01-01	3.0810299999999997
1990-01-01	2.8024600000000000
1991-01-01	1.7035600000000000
1992-01-01	2.5314500000000000
1993-01-01	2.4887000000000000
1994-01-01	2.2270400000000000
1995-01-01	2.3436200000000000
1996-01-01	1.7310700000000000
1997-01-01	1.5045200000000000
1998-01-01	0.9500860000000001
1999-01-01	0.7166390000000000
2000-01-01	0.7335840000000000
2001-01-01	0.8772320000000000
2002-01-01	1.0445100000000000
2003-01-01	1.2412700000000000
2004-01-01	0.8419220000000000
2005-01-01	0.7624680000000000
2006-01-01	0.9628459999999999
2007-01-01	1.0610500000000000
2008-01-01	1.0069200000000000
2009-01-01	1.0184000000000000
2010-01-01	1.1401900000000000
2011-01-01	0.9874959999999999
2012-01-01	1.1979100000000000
2013-01-01	0.9514480000000000
2014-01-01	0.9165960000000000
2015-01-01	0.9655040000000001
2016-01-01	0.8476969999999999
2017-01-01	1.3936700000000000