Year	Percent
1960-01-01	1.27053000000000000
1961-01-01	1.13694000000000000
1962-01-01	1.11064000000000000
1963-01-01	1.11366000000000000
1964-01-01	1.07121000000000000
1965-01-01	1.09072000000000010
1966-01-01	1.17019000000000000
1967-01-01	1.32595000000000000
1968-01-01	1.40160000000000000
1969-01-01	1.69390999999999980
1970-01-01	1.78910999999999980
1971-01-01	1.44707000000000000
1972-01-01	1.13011000000000000
1973-01-01	0.89446399999999990
1974-01-01	0.86016500000000000
1975-01-01	0.97134200000000000
1976-01-01	0.95641700000000000
1977-01-01	1.16767999999999980
1978-01-01	1.12307999999999990
1979-01-01	1.16881000000000010
1980-01-01	1.22806000000000000
1981-01-01	1.26844000000000000
1982-01-01	1.23070000000000000
1983-01-01	1.31074000000000000
1984-01-01	1.34941000000000000
1985-01-01	1.36661000000000000
1986-01-01	1.36978000000000000
1987-01-01	1.34189000000000000
1988-01-01	1.29241000000000000
1989-01-01	1.26629000000000000
1990-01-01	1.24602000000000010
1991-01-01	1.28564000000000000
1992-01-01	1.30540000000000000
1993-01-01	1.29101000000000000
1994-01-01	1.26934000000000000
1995-01-01	1.28270000000000000
1996-01-01	1.28335000000000000
1997-01-01	1.49097000000000010
1998-01-01	1.67809000000000000
1999-01-01	1.65062999999999980
2000-01-01	1.61614000000000000
2001-01-01	1.70729000000000020
2002-01-01	1.88537999999999980
2003-01-01	2.04272999999999970
2004-01-01	2.02445000000000000
2005-01-01	1.29659000000000000
2006-01-01	0.57506000000000000
2007-01-01	0.44583700000000000
2008-01-01	0.35862200000000000
2009-01-01	0.35251000000000000
2010-01-01	0.32131000000000000
2011-01-01	0.27899800000000000
2012-01-01	0.28039500000000000
2013-01-01	0.26091500000000000
2014-01-01	0.26354600000000000
2015-01-01	0.28593700000000000
2016-01-01	0.28323000000000004