Year	Number of Firms
1997-01-01	10
2002-01-01	12
2003-01-01	16
2004-01-01	9
2005-01-01	6
2006-01-01	4
2008-01-01	1
2009-01-01	1
2010-01-01	1
2011-01-01	1
2012-01-01	3
2013-01-01	1
2014-01-01	3
2015-01-01	2
2016-01-01	1