Year	Number
2004-01-01	6044
2005-01-01	8201
2006-01-01	7278
2007-01-01	6979
2008-01-01	7526
2009-01-01	8178
2010-01-01	9026
2011-01-01	9697
2012-01-01	11255
2013-01-01	23011
2014-01-01	43665
2015-01-01	102034
2016-01-01	133860