Year	Percent
1980-01-01	0.100524000000000000
1981-01-01	0.066527000000000000
1982-01-01	0.063063000000000000
1983-01-01	0.050806000000000000
1984-01-01	0.041143000000000000
1985-01-01	0.040520999999999995
1986-01-01	0.042696000000000000
1987-01-01	0.152045000000000000
1988-01-01	7.312780000000000000
1989-01-01	5.178400000000000000
1990-01-01	3.458580000000000400
1991-01-01	5.452980000000000000
1992-01-01	3.738140000000000000
1993-01-01	2.802770000000000000
1994-01-01	2.038450000000000000
1995-01-01	1.891260000000000000
1996-01-01	2.091129999999999700
1997-01-01	2.279630000000000000
1998-01-01	1.874280000000000000
1999-01-01	1.557460000000000000
2000-01-01	2.021920000000000000
2001-01-01	2.447530000000000000
2002-01-01	1.922940000000000000
2003-01-01	2.298860000000000000
2004-01-01	1.579610000000000000
2005-01-01	1.642329999999999800
2006-01-01	2.051540000000000000
2007-01-01	1.115620000000000000
2008-01-01	1.235970000000000000
2009-01-01	1.447640000000000000
2010-01-01	1.664020000000000000
2011-01-01	1.344990000000000000
2012-01-01	0.989364999999999900
2013-01-01	1.267029999999999900
2014-01-01	1.804750000000000000
2015-01-01	3.658610000000000000
2016-01-01	6.465960000000000000