Year	Number of Firms
1992-01-01	5
1997-01-01	18
2002-01-01	12
2003-01-01	15
2004-01-01	18
2005-01-01	15
2006-01-01	11
2007-01-01	14
2008-01-01	13
2009-01-01	12
2010-01-01	12
2011-01-01	10
2012-01-01	8
2013-01-01	6
2014-01-01	5
2015-01-01	5
2016-01-01	6