Year	Number of Firms
1992-01-01	7
1997-01-01	18
2002-01-01	18
2003-01-01	20
2004-01-01	27
2005-01-01	25
2006-01-01	23
2007-01-01	23
2008-01-01	28
2009-01-01	24
2010-01-01	32
2011-01-01	41
2012-01-01	36
2013-01-01	39
2014-01-01	35
2015-01-01	40
2016-01-01	33