Year	Number
2004-01-01	4362527
2005-01-01	4956050
2006-01-01	5663407
2007-01-01	6064776
2008-01-01	7470970
2009-01-01	7647551
2010-01-01	8545915
2011-01-01	9327091
2012-01-01	10216953
2013-01-01	10620700
2014-01-01	10921212
2015-01-01	11295581
2016-01-01	11780604