Year	Number
2007-01-01	4684232
2008-01-01	4807023
2009-01-01	4899920
2010-01-01	4963644
2011-01-01	6181461
2012-01-01	6236412
2013-01-01	6251558
2014-01-01	6226566
2015-01-01	6231065
2016-01-01	6256394
2017-01-01	6263062