Year	Number of Firms
1992-01-01	15
1997-01-01	32
2002-01-01	38
2003-01-01	43
2004-01-01	27
2005-01-01	6
2006-01-01	7
2007-01-01	7
2008-01-01	7
2009-01-01	4
2010-01-01	6
2011-01-01	6
2012-01-01	1
2014-01-01	1
2016-01-01	1