Year	Percent
2000-01-01	9.23918405620542
2001-01-01	10.78704531332360
2002-01-01	12.02474145367670
2003-01-01	11.78568202254690
2004-01-01	11.33322004270520
2005-01-01	10.42136045969770
2006-01-01	6.65833498238109
2007-01-01	4.63196521828740
2008-01-01	3.35897342584088
2009-01-01	4.10966936691122
2010-01-01	4.97394845731506
2011-01-01	4.83374220407733
2012-01-01	5.07804834039956
2013-01-01	5.23519856306511