Year	Percent
1962-01-01	0.54902000000000000
1963-01-01	0.35885200000000000
1964-01-01	0.32772300000000000
1965-01-01	0.43033900000000000
1966-01-01	0.92415700000000000
1967-01-01	1.44828999999999990
1968-01-01	1.56433000000000000
1969-01-01	1.84483000000000000
1970-01-01	0.41402500000000000
1971-01-01	0.12399400000000001
1972-01-01	0.18493099999999998
1973-01-01	0.42097500000000000
1974-01-01	0.46595900000000000
1975-01-01	0.55324200000000000
1976-01-01	0.29475400000000000
1977-01-01	0.08582800000000000
1978-01-01	0.41116199999999997
1979-01-01	1.20597000000000000
1980-01-01	1.59161000000000000
1981-01-01	2.20162999999999980
1982-01-01	2.36538000000000000
1983-01-01	2.85622000000000000
1984-01-01	3.11976000000000000
1985-01-01	2.90055000000000000
1986-01-01	3.03763000000000000
1987-01-01	3.16946000000000000
1988-01-01	3.14537000000000000
1989-01-01	3.71889000000000000
1990-01-01	4.83603000000000000
1991-01-01	5.26492000000000000
1992-01-01	5.03478000000000050
1993-01-01	4.05629000000000000
1994-01-01	3.21502000000000000
1995-01-01	3.24865000000000000
1996-01-01	3.50398000000000030
1997-01-01	3.63890999999999960
1998-01-01	3.71751999999999950
1999-01-01	3.15328000000000000
2000-01-01	2.91035000000000000
2001-01-01	2.61474000000000030
2002-01-01	2.25995000000000000
2003-01-01	1.92662000000000000
2004-01-01	1.66354000000000020
2005-01-01	1.44334000000000000
2006-01-01	0.71416200000000000
2007-01-01	0.14005599999999999
2008-01-01	0.30129900000000000
2009-01-01	1.03579000000000000
2010-01-01	1.71482000000000000
2011-01-01	1.98040000000000000
2012-01-01	2.22025000000000000
2013-01-01	2.22621000000000000
2014-01-01	2.13978000000000000
2015-01-01	1.98499000000000030
2016-01-01	1.70315000000000000