Year	Number
2004-01-01	2382499
2005-01-01	3652572
2006-01-01	3960214
2007-01-01	4291322
2008-01-01	4153496
2009-01-01	4390662
2010-01-01	4266799
2011-01-01	4476713
2012-01-01	4562175
2013-01-01	4753978
2014-01-01	5038177
2015-01-01	5405136
2016-01-01	5977648
2017-01-01	6512845