Year	Number of Firms
1992-01-01	3
1997-01-01	21
2002-01-01	23
2003-01-01	24
2004-01-01	25
2005-01-01	21
2006-01-01	27
2007-01-01	41
2008-01-01	28
2009-01-01	27
2010-01-01	33
2011-01-01	33
2012-01-01	33
2013-01-01	34
2014-01-01	24
2015-01-01	36
2016-01-01	27