Year	Number of Firms
1992-01-01	4
1997-01-01	7
2002-01-01	3
2003-01-01	1
2004-01-01	9
2005-01-01	11
2006-01-01	11
2007-01-01	16
2008-01-01	18
2009-01-01	13
2010-01-01	18
2011-01-01	13
2012-01-01	20
2013-01-01	17
2014-01-01	20
2015-01-01	20
2016-01-01	22