Year	Number
2004-01-01	43500
2005-01-01	57458
2006-01-01	65287
2007-01-01	71301
2008-01-01	75442
2009-01-01	90232
2010-01-01	131100
2011-01-01	154012
2012-01-01	170064
2013-01-01	131723
2014-01-01	157443
2015-01-01	157837