Year	Number
2006-01-01	10458
2007-01-01	9427
2008-01-01	9463
2009-01-01	7092
2010-01-01	14790
2011-01-01	11549
2012-01-01	7698
2013-01-01	7005
2014-01-01	19088
2015-01-01	8981