Year	Percent
2005-01-01	3.67789121949387
2006-01-01	3.68119410773974
2007-01-01	3.76568690879688
2008-01-01	4.03011729708269
2009-01-01	5.55800496456374
2010-01-01	5.50637244278384
2011-01-01	5.36612734059543
2012-01-01	5.08445234310507
2013-01-01	5.10486092310992
2014-01-01	5.00280555050138
2015-01-01	4.50195545050082
2016-01-01	4.03632441015680
2017-01-01	3.56810674255278