Year	Percent
1980-01-01	0.038998000000000005
1981-01-01	0.035410000000000004
1982-01-01	0.044940000000000000
1983-01-01	0.040839000000000000
1984-01-01	0.042017000000000000
1985-01-01	0.058396000000000000
1986-01-01	0.058991999999999996
1987-01-01	0.072265000000000000
1988-01-01	0.084695000000000000
1989-01-01	0.104607999999999990
1990-01-01	0.125105000000000000
1991-01-01	0.123942000000000010
1992-01-01	0.122513000000000010
1993-01-01	0.103415000000000000
1994-01-01	0.102029000000000000
1995-01-01	0.097380000000000000
1996-01-01	0.117425000000000000
1997-01-01	0.127508999999999980
1998-01-01	0.130827000000000000
1999-01-01	0.114936999999999980
2000-01-01	0.096965000000000000
2001-01-01	0.100872000000000000
2002-01-01	0.095575000000000000
2003-01-01	0.076727000000000000
2004-01-01	0.057584000000000000
2005-01-01	0.056509000000000004
2006-01-01	0.052787000000000000
2007-01-01	0.046870000000000000
2008-01-01	0.049586000000000000
2009-01-01	0.048860000000000000
2010-01-01	0.043585000000000006
2011-01-01	0.037147000000000000
2012-01-01	0.061169000000000010
2013-01-01	0.091346000000000010
2014-01-01	0.112511999999999990
2015-01-01	0.146507000000000000
2016-01-01	0.149011999999999980