Year	Number of Firms
1992-01-01	4
1997-01-01	15
2002-01-01	20
2003-01-01	20
2004-01-01	22
2005-01-01	26
2006-01-01	27
2007-01-01	35
2008-01-01	42
2009-01-01	36
2010-01-01	36
2011-01-01	43
2012-01-01	41
2013-01-01	46
2014-01-01	42
2015-01-01	43
2016-01-01	40