Year	Number
2004-01-01	880
2005-01-01	2361
2006-01-01	2117
2007-01-01	2066
2008-01-01	2153
2009-01-01	2407
2010-01-01	2618
2011-01-01	5853
2012-01-01	15907
2013-01-01	507
2014-01-01	498
2015-01-01	468
2016-01-01	549
2017-01-01	626