Year	Number of Firms
2002-01-01	6
2003-01-01	3
2004-01-01	3
2005-01-01	2
2006-01-01	6
2007-01-01	3
2008-01-01	2
2009-01-01	2
2011-01-01	5
2013-01-01	2
2015-01-01	2
2016-01-01	3