Year	Number
2007-01-01	26545
2008-01-01	34685
2009-01-01	36472
2010-01-01	29747
2011-01-01	23568
2012-01-01	20865
2013-01-01	20920
2014-01-01	21270
2015-01-01	24463
2016-01-01	26252
2017-01-01	27932