Year	Number
2005-01-01	50
2006-01-01	61
2007-01-01	198
2008-01-01	223
2009-01-01	232
2010-01-01	294
2011-01-01	315
2012-01-01	340
2013-01-01	358
2014-01-01	339
2015-01-01	307
2016-01-01	316
2017-01-01	335