Year	Percent
1989-01-01	61.3325965106187000
1990-01-01	35.6429829712270000
1991-01-01	13.4415584415586000
1992-01-01	9.8645296699102800
1993-01-01	6.2672224151902900
1994-01-01	6.7844807862023200
1995-01-01	19.5939189878584000
1996-01-01	13.0244156963462000
1997-01-01	27.5088624491449000
1998-01-01	90.9807345622879000
1999-01-01	125.2721283992800000
2000-01-01	25.0846414281315000
2001-01-01	7.8118079478347200
2002-01-01	10.6313446323333000
2003-01-01	15.4893529233525000
2004-01-01	10.4622667314208000
2005-01-01	7.1654175994663400
2006-01-01	6.8021893803641800
2007-01-01	4.5222976072626300
2008-01-01	7.6293050288067600
2009-01-01	0.0352943680189695
2010-01-01	5.9823483848293900
2011-01-01	7.5689885610997300
2012-01-01	4.2551267783209400
2013-01-01	6.3714271778294000
2014-01-01	4.1292430687377500
2015-01-01	1.2773542710298600
2016-01-01	1.5967956294317800
2017-01-01	0.8251596892198630