Year	Number of Firms
1997-01-01	3
2002-01-01	2
2003-01-01	2
2005-01-01	3
2006-01-01	3
2007-01-01	5
2008-01-01	12
2009-01-01	21
2010-01-01	22
2011-01-01	37
2012-01-01	39
2013-01-01	28
2014-01-01	32
2015-01-01	36
2016-01-01	24