Year	Number
2008-01-01	71431
2009-01-01	20900
2010-01-01	45690
2011-01-01	75554
2012-01-01	46263
2013-01-01	49373
2014-01-01	18008
2015-01-01	23655
2016-01-01	25085
2017-01-01	36666