Year	Number of Firms
1992-01-01	5
1997-01-01	4
2002-01-01	1
2004-01-01	1
2005-01-01	4
2006-01-01	5
2007-01-01	5
2009-01-01	2
2010-01-01	5
2011-01-01	5
2012-01-01	5
2013-01-01	8
2014-01-01	8
2015-01-01	8
2016-01-01	17