Year	Number of Firms
1992-01-01	21
1997-01-01	34
2002-01-01	34
2003-01-01	36
2004-01-01	41
2005-01-01	36
2006-01-01	46
2007-01-01	49
2008-01-01	50
2009-01-01	43
2010-01-01	33
2011-01-01	30
2012-01-01	17
2013-01-01	16
2014-01-01	12
2015-01-01	16
2016-01-01	9