Year	Number
2008-01-01	4139250
2009-01-01	4070031
2010-01-01	3929726
2011-01-01	3791204
2012-01-01	3809976
2013-01-01	3661745
2014-01-01	3501200
2015-01-01	3524116
2016-01-01	3393137
2017-01-01	3398208