Year	Number of Firms
1992-01-01	4
1997-01-01	19
2002-01-01	24
2003-01-01	26
2004-01-01	19
2005-01-01	33
2006-01-01	28
2007-01-01	47
2008-01-01	41
2009-01-01	34
2010-01-01	42
2011-01-01	43
2012-01-01	35
2013-01-01	26
2014-01-01	28
2015-01-01	32
2016-01-01	32