Year	Number
2004-01-01	4085638
2005-01-01	4419627
2006-01-01	4953613
2007-01-01	5380629
2008-01-01	5616825
2009-01-01	8036888
2010-01-01	8091366
2011-01-01	8865222
2012-01-01	9640200
2013-01-01	10301626
2014-01-01	11427008
2015-01-01	12798623
2016-01-01	12938123