Year	Percent
1999-01-01	0.27352300000000000
2000-01-01	0.29540700000000003
2001-01-01	0.22495000000000000
2002-01-01	0.19720500000000000
2003-01-01	0.20199999999999999
2004-01-01	0.18293399999999999
2005-01-01	0.16504000000000002
2006-01-01	0.14652200000000000
2007-01-01	0.13538499999999998
2008-01-01	0.11401300000000002
2009-01-01	0.11653300000000000
2010-01-01	0.10533000000000000
2011-01-01	0.09488700000000000
2012-01-01	0.09080800000000000
2013-01-01	0.08624900000000000
2014-01-01	0.08095400000000000
2015-01-01	0.08448700000000000
2016-01-01	0.09271700000000000