Year	Number of Firms
1992-01-01	10
1997-01-01	9
2002-01-01	11
2003-01-01	15
2004-01-01	5
2005-01-01	4
2006-01-01	1
2007-01-01	1
2008-01-01	2
2009-01-01	2
2010-01-01	2
2011-01-01	4
2012-01-01	2