Year	Number of Firms
2004-01-01	2
2005-01-01	3
2006-01-01	3
2007-01-01	5
2008-01-01	9
2009-01-01	5
2010-01-01	7
2011-01-01	5
2012-01-01	3
2013-01-01	5
2014-01-01	9
2015-01-01	5
2016-01-01	4