Year	Number
2004-01-01	75
2005-01-01	90
2006-01-01	146
2007-01-01	214
2008-01-01	174
2009-01-01	165
2010-01-01	128
2011-01-01	191
2012-01-01	243
2013-01-01	261
2014-01-01	316
2015-01-01	333
2016-01-01	308
2017-01-01	276