Year	Number of Firms
1992-01-01	13
1997-01-01	26
2002-01-01	28
2003-01-01	40
2004-01-01	22
2005-01-01	1
2006-01-01	1
2007-01-01	3
2008-01-01	5
2009-01-01	4
2010-01-01	5
2011-01-01	2
2012-01-01	3
2013-01-01	1