Year	Number of Firms
1997-01-01	2
2002-01-01	9
2003-01-01	8
2004-01-01	8
2005-01-01	7
2006-01-01	4
2007-01-01	6
2008-01-01	8
2009-01-01	5
2010-01-01	12
2011-01-01	8
2012-01-01	6
2013-01-01	15
2014-01-01	14
2015-01-01	4
2016-01-01	9