Year	Number of Firms
1992-01-01	12
1997-01-01	17
2002-01-01	20
2003-01-01	32
2004-01-01	21
2005-01-01	21
2006-01-01	33
2007-01-01	43
2008-01-01	39
2009-01-01	38
2010-01-01	39
2011-01-01	35
2012-01-01	39
2013-01-01	39
2014-01-01	36
2015-01-01	35
2016-01-01	36