Year	Percent
1980-01-01	0.013078999999999999
1981-01-01	0.012764000000000000
1982-01-01	0.043396000000000000
1983-01-01	0.065457000000000000
1984-01-01	0.086172000000000000
1985-01-01	0.354779000000000000
1986-01-01	0.872462000000000100
1987-01-01	1.588070000000000000
1988-01-01	1.617720000000000000
1989-01-01	1.400650000000000000
1990-01-01	1.406370000000000100
1991-01-01	1.442460000000000000
1992-01-01	1.357179999999999800
1993-01-01	2.090030000000000000
1994-01-01	2.419530000000000000
1995-01-01	1.847260000000000000
1996-01-01	1.695520000000000100
1997-01-01	1.863870000000000100
1998-01-01	1.750560000000000000
1999-01-01	1.671120000000000200
2000-01-01	1.505100000000000000
2001-01-01	1.381070000000000000
2002-01-01	1.259460000000000000
2003-01-01	1.292730000000000000
2004-01-01	1.297930000000000000
2005-01-01	1.217380000000000000
2006-01-01	1.075490000000000000
2007-01-01	1.159400000000000000
2008-01-01	1.012260000000000000
2009-01-01	0.932944000000000000
2010-01-01	1.191420000000000100
2011-01-01	1.570550000000000000
2012-01-01	2.046670000000000000
2013-01-01	2.876610000000000000
2014-01-01	4.139920000000000000
2015-01-01	4.782890000000000000
2016-01-01	5.714480000000000000