Year	Number
2008-01-01	5287659
2009-01-01	5369771
2010-01-01	5312528
2011-01-01	5358551
2012-01-01	5670877
2013-01-01	5755769
2014-01-01	5906485
2015-01-01	6098736
2016-01-01	6045889