Year	Number
2004-01-01	1863371
2005-01-01	2168082
2006-01-01	2582176
2007-01-01	3570405
2008-01-01	4654143
2009-01-01	3882798
2010-01-01	4128628
2011-01-01	4575364
2012-01-01	5052771
2013-01-01	5399794
2014-01-01	5536285
2015-01-01	5618533
2016-01-01	5618532
2017-01-01	5586749