Year	Number
2004-01-01	3378
2005-01-01	2907
2006-01-01	3923
2007-01-01	4241
2008-01-01	4637
2009-01-01	5504
2010-01-01	6705
2011-01-01	6904
2012-01-01	7038
2013-01-01	7173
2014-01-01	7303
2015-01-01	8054
2016-01-01	8194