Year	Percent
1980-01-01	0.0115730000000000000
1981-01-01	0.0142420000000000000
1982-01-01	0.0120959999999999990
1983-01-01	0.0117060000000000000
1984-01-01	0.0111349999999999990
1985-01-01	0.0061000000000000000
1986-01-01	0.0019410000000000000
1987-01-01	0.0075980000000000010
1988-01-01	0.0062759999999999995
1989-01-01	0.0058710000000000000
1990-01-01	0.0054200000000000000
1991-01-01	0.0053549999999999995
1992-01-01	0.0376870000000000000
1993-01-01	0.1026450000000000000
1994-01-01	0.1292680000000000000
1995-01-01	0.1530369999999999800
1996-01-01	0.1408800000000000000
1997-01-01	0.1414180000000000200
1998-01-01	0.1593380000000000000
1999-01-01	0.1209720000000000000
2000-01-01	0.1088570000000000000
2001-01-01	0.3491200000000000000
2002-01-01	0.3481090000000000000
2003-01-01	0.3345490000000000000
2004-01-01	0.3176870000000000000
2005-01-01	0.2838280000000000000
2006-01-01	0.3195150000000000000
2007-01-01	0.3254559999999999700
2008-01-01	0.3053960000000000000
2009-01-01	0.3485120000000000000
2010-01-01	0.5921520000000000000
2011-01-01	0.5412110000000000000
2012-01-01	0.3968560000000000000
2013-01-01	0.4085030000000000000
2014-01-01	0.3299250000000000000
2015-01-01	0.3329970000000000000
2016-01-01	0.3069090000000000000