Year	Number
2007-01-01	23355
2008-01-01	29979
2009-01-01	35829
2010-01-01	44576
2011-01-01	48591
2012-01-01	89007
2013-01-01	119325
2014-01-01	221208
2015-01-01	174716
2016-01-01	280308