Year	Number
2007-01-01	6781854
2008-01-01	7258289
2009-01-01	7736008
2010-01-01	8217082
2011-01-01	8976558
2012-01-01	9370234
2013-01-01	9833644
2014-01-01	10348333
2015-01-01	10874203
2016-01-01	11225743