Year	Number
2007-01-01	5130844
2008-01-01	5039049
2009-01-01	5552395
2010-01-01	5757894
2011-01-01	6115367
2012-01-01	6477298
2013-01-01	6950771
2014-01-01	7196139
2015-01-01	7945508
2016-01-01	8320145