Year	Number
2007-01-01	13.3170
2008-01-01	14.4898
2009-01-01	16.9609
2010-01-01	20.1142
2011-01-01	24.5895
2012-01-01	27.9803
2013-01-01	31.5674
2014-01-01	34.7916
2015-01-01	38.3020