Year	Number
2004-01-01	2754064
2005-01-01	3009977
2006-01-01	3284871
2007-01-01	3777119
2008-01-01	4165250
2009-01-01	4198667
2010-01-01	4418522
2011-01-01	4616353
2012-01-01	4766210
2013-01-01	5075762
2014-01-01	4903878
2015-01-01	3351199
2016-01-01	3762509
2017-01-01	4041782