Year	Number of Firms
1992-01-01	3
1997-01-01	19
2002-01-01	12
2003-01-01	15
2004-01-01	12
2005-01-01	15
2006-01-01	22
2007-01-01	34
2008-01-01	28
2009-01-01	22
2010-01-01	33
2011-01-01	32
2012-01-01	37
2013-01-01	38
2014-01-01	37
2015-01-01	36
2016-01-01	38