Year	Percent
2005-01-01	8.26465376279301
2006-01-01	7.53935263147981
2007-01-01	6.56103967720626
2008-01-01	6.55497105596682
2009-01-01	8.91840398625744
2010-01-01	9.55190192755793
2011-01-01	9.52307721876619
2012-01-01	10.36943160755430
2013-01-01	10.77655522248880
2014-01-01	10.10757407697000
2015-01-01	9.30013565271749
2016-01-01	8.36098820565212
2017-01-01	7.41313417462997