Year	Number
2008-01-01	2441847
2009-01-01	2348141
2010-01-01	2268637
2011-01-01	2416585
2012-01-01	2236192
2013-01-01	1979506
2014-01-01	2032151
2015-01-01	1964515
2016-01-01	1721046