Year	Number of Firms
1997-01-01	3
2002-01-01	19
2003-01-01	33
2004-01-01	38
2005-01-01	55
2006-01-01	45
2007-01-01	31
2008-01-01	47
2009-01-01	27
2010-01-01	4
2011-01-01	3
2012-01-01	6
2014-01-01	3
2016-01-01	2