Year	Percent
2000-01-01	2.44326664841292
2001-01-01	2.24204631404282
2002-01-01	2.62153315535890
2003-01-01	2.80108906385719
2004-01-01	2.74370575944969
2005-01-01	2.61158572471229
2006-01-01	2.64968050098448
2007-01-01	3.06761714287949
2008-01-01	4.57077820815641
2009-01-01	8.57119650509602
2010-01-01	9.37714146832891
2011-01-01	9.55098154290431
2012-01-01	9.48224204315738
2013-01-01	7.99200408165567