Year	Percent
2003-01-01	2.40097974261402
2004-01-01	2.21865147982903
2005-01-01	1.90892997119633
2006-01-01	2.38326967686409
2007-01-01	1.76497123171736
2008-01-01	1.97458086072044
2009-01-01	4.34809599342657
2010-01-01	5.19424189215918
2011-01-01	4.74757175795355
2012-01-01	4.35977234990758
2013-01-01	3.96586632610620