Year	Number
2008-01-01	4237430
2009-01-01	4159705
2010-01-01	4014397
2011-01-01	3875511
2012-01-01	3893691
2013-01-01	3743052
2014-01-01	3584212
2015-01-01	3608543
2016-01-01	3477934
2017-01-01	3483520