Year	Number of Firms
1992-01-01	5
1997-01-01	10
2002-01-01	10
2003-01-01	21
2004-01-01	21
2005-01-01	21
2006-01-01	18
2007-01-01	19
2008-01-01	16
2009-01-01	21
2010-01-01	19
2011-01-01	18
2012-01-01	20
2013-01-01	19
2014-01-01	25
2015-01-01	18
2016-01-01	27