Year	Number
2004-01-01	1317
2005-01-01	1099
2006-01-01	931
2007-01-01	1258
2008-01-01	1801
2009-01-01	1873
2010-01-01	2849
2011-01-01	3359
2012-01-01	13065
2013-01-01	14266
2014-01-01	14481
2015-01-01	14767
2016-01-01	19890