Year	Number of Firms
1997-01-01	4
2002-01-01	5
2003-01-01	17
2004-01-01	16
2005-01-01	14
2006-01-01	12
2007-01-01	24
2008-01-01	26
2009-01-01	22
2010-01-01	35
2011-01-01	32
2012-01-01	23
2013-01-01	36
2014-01-01	29
2015-01-01	30
2016-01-01	27