Year	Number of Firms
1997-01-01	1
2002-01-01	4
2003-01-01	3
2004-01-01	1
2005-01-01	1
2006-01-01	3
2007-01-01	4
2008-01-01	1
2009-01-01	3
2010-01-01	8
2011-01-01	8
2012-01-01	8
2013-01-01	12
2014-01-01	13
2015-01-01	8
2016-01-01	7