Year	Number
2004-01-01	139
2005-01-01	172
2006-01-01	166
2007-01-01	183
2008-01-01	207
2009-01-01	224
2010-01-01	351
2011-01-01	544
2012-01-01	374
2013-01-01	653
2014-01-01	845
2015-01-01	692
2016-01-01	947