Year	Number
2004-01-01	3104584
2005-01-01	4324753
2006-01-01	2918857
2007-01-01	3071971
2008-01-01	3439264
2009-01-01	3720607
2010-01-01	3739231
2011-01-01	4346572
2012-01-01	3853016