Year	Number
2004-01-01	10977327
2005-01-01	10926186
2006-01-01	12100760
2007-01-01	12195656
2008-01-01	12273235
2009-01-01	11975594
2010-01-01	11741723
2011-01-01	11404471
2012-01-01	11434429
2013-01-01	11268124
2014-01-01	11820124
2015-01-01	11964551
2016-01-01	11497586