Year	Number
2008-01-01	2.3874
2009-01-01	3.2523
2010-01-01	3.9425
2011-01-01	4.6053
2012-01-01	5.0688
2013-01-01	5.5102
2014-01-01	5.6326
2015-01-01	5.9973