Year	Number
2004-01-01	1
2005-01-01	152
2006-01-01	602
2007-01-01	662
2008-01-01	599
2009-01-01	676
2010-01-01	946
2011-01-01	970
2012-01-01	4301
2013-01-01	5269
2014-01-01	4459
2015-01-01	5571
2016-01-01	12864