Year	Number
2007-01-01	32510
2008-01-01	80483
2009-01-01	105858
2010-01-01	156268
2011-01-01	241658
2012-01-01	348640
2013-01-01	332693
2014-01-01	571605
2015-01-01	531189
2016-01-01	1151355