Year	Number
2004-01-01	31360
2005-01-01	71619
2006-01-01	145453
2007-01-01	170370
2008-01-01	239373
2009-01-01	237293
2010-01-01	285201
2011-01-01	315233
2012-01-01	348620
2013-01-01	338452
2014-01-01	359714
2015-01-01	346982
2016-01-01	373411