Year	Number of Firms
2002-01-01	9
2003-01-01	8
2004-01-01	10
2005-01-01	19
2006-01-01	13
2007-01-01	18
2008-01-01	18
2009-01-01	16
2011-01-01	1
2012-01-01	3
2014-01-01	2