Year	Number
2006-01-01	1104649
2007-01-01	1294396
2008-01-01	1381974
2009-01-01	1312052
2010-01-01	1397185
2011-01-01	1415327
2012-01-01	3891640
2013-01-01	3848682
2014-01-01	3919102
2015-01-01	4284030
2016-01-01	4381510
2017-01-01	4394388