Year	Number
2008-01-01	6804295
2009-01-01	6738086
2010-01-01	6418886
2011-01-01	6042023
2012-01-01	6030537
2013-01-01	5776876
2014-01-01	5508422
2015-01-01	5489180
2016-01-01	5467745
2017-01-01	5509917