Year	Number
2004-01-01	3206406
2005-01-01	3608626
2006-01-01	4160093
2007-01-01	4074241
2008-01-01	4810752
2009-01-01	5475109
2010-01-01	5938171
2011-01-01	6558241
2012-01-01	7174365
2013-01-01	7681459
2014-01-01	8002978
2015-01-01	8148246
2016-01-01	8700800
2017-01-01	9104178