Year	Number
2004-01-01	830854
2005-01-01	855823
2006-01-01	1018929
2007-01-01	1202433
2008-01-01	1384863
2009-01-01	1624855
2010-01-01	1974863
2011-01-01	2335159
2012-01-01	2741277
2013-01-01	3261088
2014-01-01	3753213
2015-01-01	4349413
2016-01-01	5154597
2017-01-01	6059114