Year	Number
2006-01-01	12.7967
2007-01-01	15.2475
2008-01-01	20.0364
2009-01-01	22.2953
2010-01-01	28.0190
2011-01-01	31.7002
2012-01-01	36.2369
2013-01-01	43.0592
2014-01-01	44.9511
2015-01-01	47.9153