Year	Number
2004-01-01	5222636
2005-01-01	5621034
2006-01-01	5839991
2007-01-01	5861987
2008-01-01	5970926
2009-01-01	6004340
2010-01-01	6141272
2011-01-01	7055808
2012-01-01	7298170
2013-01-01	6812158
2014-01-01	6837785
2015-01-01	6669661
2016-01-01	6590692