Year	Number
2004-01-01	526
2005-01-01	597
2006-01-01	622
2007-01-01	687
2008-01-01	736
2009-01-01	600
2010-01-01	605
2011-01-01	642
2012-01-01	503
2013-01-01	431
2014-01-01	350
2015-01-01	298
2016-01-01	279
2017-01-01	262