Year	Number
2004-01-01	7936137
2005-01-01	8269705
2006-01-01	8578908
2007-01-01	9044518
2008-01-01	9473407
2009-01-01	10347477
2010-01-01	9912022
2011-01-01	10022468
2012-01-01	9963980
2013-01-01	9874687
2014-01-01	8902547
2015-01-01	8653201
2016-01-01	8502945
2017-01-01	8234605