Year	Number of Firms
1992-01-01	3
2002-01-01	1
2003-01-01	2
2004-01-01	5
2005-01-01	4
2006-01-01	2
2007-01-01	1
2008-01-01	3
2009-01-01	3
2010-01-01	4
2011-01-01	7
2012-01-01	4
2013-01-01	3
2015-01-01	4