Year	Number of Firms
1992-01-01	2
1997-01-01	4
2002-01-01	22
2003-01-01	27
2004-01-01	28
2005-01-01	35
2006-01-01	24
2007-01-01	36
2008-01-01	39
2009-01-01	40
2010-01-01	40
2011-01-01	39
2012-01-01	35
2013-01-01	34
2014-01-01	37
2015-01-01	38
2016-01-01	49