Year	Number
2004-01-01	212565
2005-01-01	233533
2006-01-01	299410
2007-01-01	352533
2008-01-01	412706
2009-01-01	533441
2010-01-01	612686
2011-01-01	2336827
2012-01-01	2886476
2013-01-01	3852522
2014-01-01	4063762
2015-01-01	4519711
2016-01-01	4713245