Year	Number
2004-01-01	21724
2005-01-01	30373
2006-01-01	30241
2007-01-01	24724
2008-01-01	23446
2009-01-01	21882
2010-01-01	22339
2011-01-01	29744
2012-01-01	31413
2013-01-01	48673
2014-01-01	71612
2015-01-01	129543
2016-01-01	169365