Year	Number of Firms
1992-01-01	3
1997-01-01	12
2002-01-01	20
2003-01-01	14
2004-01-01	21
2005-01-01	12
2006-01-01	16
2007-01-01	18
2008-01-01	15
2009-01-01	12
2010-01-01	16
2011-01-01	12
2012-01-01	6
2013-01-01	9
2014-01-01	8
2015-01-01	9
2016-01-01	7