Year	Number
2004-01-01	2644
2005-01-01	2557
2006-01-01	2125
2007-01-01	2123
2008-01-01	2156
2009-01-01	2496
2010-01-01	1848
2011-01-01	3721
2012-01-01	4247
2013-01-01	4773
2014-01-01	4386
2015-01-01	4805
2016-01-01	5467