Year	Number of Firms
1992-01-01	18
1997-01-01	37
2002-01-01	39
2003-01-01	41
2004-01-01	40
2005-01-01	52
2006-01-01	52
2007-01-01	52
2008-01-01	58
2009-01-01	58
2010-01-01	53
2011-01-01	45
2012-01-01	37
2013-01-01	34
2014-01-01	37
2015-01-01	37
2016-01-01	32