Year	Percent
1980-01-01	0.1261920000000000
1981-01-01	0.0977730000000000
1982-01-01	0.0977730000000000
1983-01-01	0.0977730000000000
1984-01-01	0.0977730000000000
1985-01-01	0.0977730000000000
1986-01-01	0.0977730000000000
1987-01-01	0.0977730000000000
1988-01-01	0.0977730000000000
1989-01-01	0.6417830000000000
1990-01-01	0.7488140000000000
1991-01-01	0.7399840000000000
1992-01-01	0.6890180000000000
1993-01-01	5.5322600000000000
1994-01-01	5.4188199999999990
1995-01-01	5.6377000000000000
1996-01-01	6.0641600000000000
1997-01-01	6.4799200000000000
1998-01-01	6.5890100000000010
1999-01-01	5.8412700000000000
2000-01-01	4.3093100000000000
2001-01-01	3.7149699999999997
2002-01-01	3.7189500000000000
2003-01-01	3.2980400000000003
2004-01-01	4.6724400000000000
2005-01-01	7.6199800000000000
2006-01-01	16.6957000000000000
2007-01-01	22.7799000000000000
2008-01-01	20.5043000000000000
2009-01-01	33.1018000000000000
2010-01-01	29.9622000000000000
2011-01-01	28.6582000000000000
2012-01-01	29.8079000000000000
2013-01-01	31.4218000000000000
2014-01-01	30.2677000000000000
2015-01-01	36.4413000000000000
2016-01-01	43.7131000000000000