Year	Number
2006-01-01	2.3280
2007-01-01	3.0347
2008-01-01	3.1411
2009-01-01	3.9629
2010-01-01	4.1194
2011-01-01	4.2761
2012-01-01	4.4912
2013-01-01	4.7750
2014-01-01	5.6947
2015-01-01	6.1241