Year	Number
2007-01-01	2.9946
2008-01-01	3.0099
2009-01-01	2.9823
2010-01-01	2.9581
2011-01-01	2.9744
2012-01-01	2.8926
2013-01-01	2.9640
2014-01-01	3.0842
2015-01-01	3.0347
2016-01-01	3.3612