Year	Number
2008-01-01	6735322
2009-01-01	6657710
2010-01-01	6589186
2011-01-01	6291916
2012-01-01	5882117
2013-01-01	5955280
2014-01-01	5333744
2015-01-01	4966237
2016-01-01	4761061