Year	Number
2006-01-01	2.2205
2007-01-01	2.6082
2008-01-01	2.8750
2009-01-01	3.1959
2010-01-01	3.6362
2011-01-01	3.6942
2012-01-01	4.0836
2013-01-01	4.2827
2014-01-01	4.6882
2015-01-01	4.9239
2016-01-01	5.4049