Year	Percent
2000-01-01	2.66994965529569
2001-01-01	2.76494294634287
2002-01-01	3.01144639378436
2003-01-01	3.30409164978083
2004-01-01	3.47054735671901
2005-01-01	3.45049763806491
2006-01-01	2.60128691350275
2007-01-01	1.93966227870725
2008-01-01	2.08878967918629
2009-01-01	2.68182497464217
2010-01-01	3.02551346853372
2011-01-01	2.52776162027963
2012-01-01	2.64478871902284
2013-01-01	2.65095669476024