Year	Number
2007-01-01	518378
2008-01-01	529213
2009-01-01	528980
2010-01-01	556297
2011-01-01	572597
2012-01-01	573028
2013-01-01	591149
2014-01-01	639415
2015-01-01	637373
2016-01-01	677322