Year	Percent
1987-01-01	0.037068000000000004
1988-01-01	0.030924000000000000
1989-01-01	0.032493000000000000
1990-01-01	0.029858999999999997
1991-01-01	0.028547000000000003
1992-01-01	0.024505000000000002
1993-01-01	0.023334000000000000
1994-01-01	0.024340999999999998
1995-01-01	0.025209000000000000
1996-01-01	0.022827000000000000
1997-01-01	0.007188000000000000
1998-01-01	0.007159000000000000
1999-01-01	0.009904999999999999
2000-01-01	0.009132000000000000
2001-01-01	0.007441000000000000
2002-01-01	0.008142000000000000
2003-01-01	0.047269000000000000
2004-01-01	0.055486000000000000
2005-01-01	0.049022000000000000
2006-01-01	0.931350000000000000
2007-01-01	0.898991000000000000
2008-01-01	3.004600000000000000
2009-01-01	2.695010000000000000
2010-01-01	2.703999999999999700
2011-01-01	2.833560000000000000
2012-01-01	3.766140000000000000
2013-01-01	2.048490000000000000
2014-01-01	1.616530000000000000
2015-01-01	1.790460000000000000
2016-01-01	1.063340000000000000