Year	Number
2007-01-01	529668
2008-01-01	1675167
2009-01-01	2116675
2010-01-01	1769638
2011-01-01	1310242
2012-01-01	1150388
2013-01-01	612368
2014-01-01	492749
2015-01-01	382252
2016-01-01	513305
2017-01-01	507185