Year	Percent
1979-01-01	0.059860000000000003
1980-01-01	0.436039000000000000
1981-01-01	0.375897000000000000
1982-01-01	0.259729000000000000
1983-01-01	0.379314000000000000
1984-01-01	0.190081000000000000
1985-01-01	0.149972000000000000
1986-01-01	0.223480999999999990
1987-01-01	0.103857999999999990
1988-01-01	0.098626999999999990
1989-01-01	0.292365999999999960
1990-01-01	0.206180000000000030
1991-01-01	0.059011000000000000
1992-01-01	0.219459000000000020
1993-01-01	0.131252000000000000
1994-01-01	0.107557000000000000
1995-01-01	0.116541000000000000
1996-01-01	0.127551000000000000
1997-01-01	0.125205999999999980
1998-01-01	0.213067000000000000
1999-01-01	0.137557999999999990
2000-01-01	0.219161000000000020
2001-01-01	0.162290000000000020
2002-01-01	0.254388000000000000
2003-01-01	0.518355000000000000
2004-01-01	0.593137000000000000
2005-01-01	0.429047000000000000
2006-01-01	0.671331000000000000
2007-01-01	0.748209000000000000
2008-01-01	0.613464000000000000
2009-01-01	0.708627000000000000
2010-01-01	0.439335000000000030
2011-01-01	0.747367000000000000
2012-01-01	0.722982000000000000
2013-01-01	0.754476000000000000
2014-01-01	0.809779000000000000
2015-01-01	0.781221000000000000
2016-01-01	0.834550000000000000
2017-01-01	0.798785000000000100