Year	Number of Firms
1997-01-01	16
2002-01-01	11
2003-01-01	12
2004-01-01	19
2005-01-01	25
2006-01-01	29
2007-01-01	34
2008-01-01	35
2009-01-01	28
2010-01-01	25
2011-01-01	32
2012-01-01	31
2013-01-01	28
2014-01-01	38
2015-01-01	35
2016-01-01	36