Year	Number of Firms
1992-01-01	7
1997-01-01	15
2002-01-01	15
2003-01-01	13
2004-01-01	12
2005-01-01	13
2006-01-01	13
2007-01-01	19
2008-01-01	15
2009-01-01	12
2010-01-01	10
2011-01-01	9
2012-01-01	12
2013-01-01	7
2014-01-01	5
2015-01-01	6
2016-01-01	4