Year	Number
2007-01-01	7947
2008-01-01	5125
2009-01-01	5136
2010-01-01	4108
2011-01-01	4713
2012-01-01	29656
2013-01-01	35040
2014-01-01	76240
2015-01-01	89409
2016-01-01	226167
2017-01-01	239033