Year	Number of Firms
1997-01-01	8
2002-01-01	16
2003-01-01	12
2004-01-01	26
2005-01-01	19
2006-01-01	29
2007-01-01	41
2008-01-01	43
2009-01-01	48
2010-01-01	38
2011-01-01	39
2012-01-01	50
2013-01-01	49
2014-01-01	42
2015-01-01	51
2016-01-01	41