Year	Number of Firms
1992-01-01	4
1997-01-01	8
2002-01-01	7
2003-01-01	10
2004-01-01	7
2005-01-01	8
2006-01-01	12
2007-01-01	20
2008-01-01	16
2009-01-01	19
2010-01-01	22
2011-01-01	22
2012-01-01	25
2013-01-01	25
2014-01-01	25
2015-01-01	24
2016-01-01	22