Year	Number
2004-01-01	779
2005-01-01	841
2006-01-01	918
2007-01-01	1000
2008-01-01	1018
2009-01-01	1006
2010-01-01	1002
2011-01-01	987
2012-01-01	934
2013-01-01	884
2014-01-01	848
2015-01-01	801
2016-01-01	772