Year	Number of Firms
1997-01-01	2
2002-01-01	9
2003-01-01	10
2004-01-01	11
2005-01-01	21
2006-01-01	22
2007-01-01	24
2008-01-01	27
2009-01-01	21
2010-01-01	12
2011-01-01	14
2012-01-01	15
2013-01-01	14
2014-01-01	10
2015-01-01	12
2016-01-01	20