Year	Number
2004-01-01	22027
2005-01-01	27767
2006-01-01	24147
2007-01-01	29637
2008-01-01	14764
2009-01-01	59037
2010-01-01	104747
2011-01-01	146806
2012-01-01	508797
2013-01-01	555402
2014-01-01	588539
2015-01-01	586219
2016-01-01	2260598