Year	Number
2006-01-01	634
2007-01-01	1749
2008-01-01	1032
2009-01-01	1803
2010-01-01	1803
2011-01-01	1958
2012-01-01	1922
2013-01-01	2296
2014-01-01	2095
2015-01-01	3141
2016-01-01	3921
2017-01-01	4204