Year	Number
2007-01-01	24286
2008-01-01	22265
2009-01-01	18687
2010-01-01	15336
2011-01-01	12299
2012-01-01	9675
2013-01-01	7488
2014-01-01	7338
2015-01-01	6328
2016-01-01	6909
2017-01-01	7312