Year	Number
2008-01-01	7039973
2009-01-01	6947120
2010-01-01	6616511
2011-01-01	6239093
2012-01-01	6226946
2013-01-01	5966257
2014-01-01	5710332
2015-01-01	5699983
2016-01-01	5684470
2017-01-01	5729550