Year	Number of Firms
1997-01-01	3
2002-01-01	23
2003-01-01	23
2004-01-01	45
2005-01-01	48
2006-01-01	40
2007-01-01	58
2008-01-01	39
2009-01-01	31
2010-01-01	5
2011-01-01	5
2012-01-01	6
2014-01-01	2
2016-01-01	2