Year	Number of Firms
1992-01-01	8
1997-01-01	17
2002-01-01	20
2003-01-01	24
2004-01-01	15
2005-01-01	6
2006-01-01	4
2007-01-01	7
2008-01-01	4
2009-01-01	5
2010-01-01	4
2011-01-01	4
2012-01-01	1
2016-01-01	1