Year	Percent
1978-01-01	1.056520000000000100
1979-01-01	0.876309000000000000
1980-01-01	0.580804000000000000
1981-01-01	0.558370000000000000
1982-01-01	0.574844999999999900
1983-01-01	0.547465000000000000
1984-01-01	0.492307000000000000
1985-01-01	0.434047000000000000
1986-01-01	0.536180000000000000
1987-01-01	0.499434000000000000
1988-01-01	0.465188000000000000
1989-01-01	0.416250000000000000
1990-01-01	0.333860000000000000
1991-01-01	0.343974000000000000
1992-01-01	0.313290000000000000
1993-01-01	0.312266000000000000
1994-01-01	0.301975000000000000
1995-01-01	0.282640000000000000
1996-01-01	0.255273000000000000
1997-01-01	0.246252000000000000
1998-01-01	0.276883000000000000
1999-01-01	0.248246999999999970
2000-01-01	0.199924000000000000
2001-01-01	0.200554000000000000
2002-01-01	0.193676000000000000
2003-01-01	0.180327000000000000
2004-01-01	0.157536999999999980
2005-01-01	0.125513000000000000
2006-01-01	0.104825000000000000
2007-01-01	0.092697000000000000
2008-01-01	0.064053000000000000
2009-01-01	0.080622000000000000
2010-01-01	0.066525000000000000
2011-01-01	0.057423000000000000
2012-01-01	0.050870000000000000
2013-01-01	0.049420000000000000
2014-01-01	0.048117000000000000
2015-01-01	0.056616999999999994
2016-01-01	0.058378999999999990
2017-01-01	0.055667999999999995