Year	Number of Firms
1992-01-01	9
1997-01-01	2
2002-01-01	8
2003-01-01	9
2004-01-01	8
2005-01-01	21
2006-01-01	20
2007-01-01	23
2008-01-01	28
2009-01-01	28
2010-01-01	19
2011-01-01	22
2012-01-01	19
2013-01-01	20
2014-01-01	27
2015-01-01	23
2016-01-01	20