Year	Number of Firms
2002-01-01	1
2003-01-01	2
2004-01-01	2
2007-01-01	1
2008-01-01	1
2009-01-01	2
2011-01-01	2
2012-01-01	2
2014-01-01	1
2015-01-01	2
2016-01-01	4