Year	Number
2004-01-01	3652835
2005-01-01	3671631
2006-01-01	3674406
2007-01-01	1446110
2008-01-01	1586138
2009-01-01	689778
2010-01-01	1241161
2011-01-01	629191
2012-01-01	686680
2013-01-01	686681
2014-01-01	784115
2015-01-01	738196
2016-01-01	2310714