Year	Number of Firms
1992-01-01	20
1997-01-01	32
2002-01-01	33
2003-01-01	31
2004-01-01	17
2005-01-01	3
2006-01-01	1
2007-01-01	2
2008-01-01	4
2009-01-01	8
2010-01-01	10
2011-01-01	5
2012-01-01	4
2015-01-01	2