Year	Number of Firms
1992-01-01	11
1997-01-01	15
2002-01-01	18
2003-01-01	19
2004-01-01	16
2005-01-01	8
2006-01-01	5
2007-01-01	3
2008-01-01	5
2009-01-01	3
2010-01-01	4
2011-01-01	3
2012-01-01	1