Year	Number of Firms
1992-01-01	4
1997-01-01	7
2002-01-01	17
2003-01-01	23
2004-01-01	26
2005-01-01	24
2006-01-01	26
2007-01-01	25
2008-01-01	30
2009-01-01	30
2010-01-01	30
2011-01-01	34
2012-01-01	36
2013-01-01	32
2014-01-01	34
2015-01-01	34
2016-01-01	34