Year	Percent
2005-01-01	41.8404909133121
2006-01-01	43.1286827243794
2007-01-01	43.5663672964686
2008-01-01	43.3400350615527
2009-01-01	43.2926225037269
2010-01-01	43.1869273792723
2011-01-01	43.7033190374867
2012-01-01	44.8635695859659
2013-01-01	44.9596016814674
2014-01-01	44.2322770732076
2015-01-01	44.6747041757599
2016-01-01	45.0611987749134
2017-01-01	44.9221951502718