Year	Percent
2005-01-01	4.14451891992071
2006-01-01	3.93418808543559
2007-01-01	3.56531061793815
2008-01-01	3.50858962286611
2009-01-01	4.10836315962352
2010-01-01	4.34708859371665
2011-01-01	4.42385713710013
2012-01-01	4.94654148765149