Year	Number of Firms
1997-01-01	4
2002-01-01	8
2003-01-01	14
2004-01-01	19
2005-01-01	20
2006-01-01	17
2007-01-01	32
2008-01-01	29
2009-01-01	37
2010-01-01	46
2011-01-01	45
2012-01-01	50
2013-01-01	46
2014-01-01	47
2015-01-01	41
2016-01-01	41