Year	Number of Firms
1997-01-01	3
2002-01-01	10
2003-01-01	9
2004-01-01	12
2005-01-01	12
2006-01-01	6
2007-01-01	12
2008-01-01	13
2009-01-01	5
2010-01-01	4
2011-01-01	4
2012-01-01	5
2013-01-01	8
2014-01-01	30
2015-01-01	36
2016-01-01	48