Year	Number
2004-01-01	11038281
2005-01-01	11644462
2006-01-01	12290829
2007-01-01	13011670
2008-01-01	13703679
2009-01-01	14418351
2010-01-01	14618363
2011-01-01	15389594
2012-01-01	15929247
2013-01-01	16450361
2014-01-01	16845811
2015-01-01	17134769
2016-01-01	17291399