Year	Number
2004-01-01	387
2005-01-01	374
2006-01-01	345
2007-01-01	367
2008-01-01	338
2009-01-01	349
2010-01-01	335
2011-01-01	307
2012-01-01	283
2013-01-01	271
2014-01-01	259
2015-01-01	248
2016-01-01	246
2017-01-01	236