Year	Number of Firms
1997-01-01	3
2002-01-01	12
2003-01-01	5
2004-01-01	8
2005-01-01	10
2006-01-01	12
2007-01-01	20
2008-01-01	18
2009-01-01	20
2010-01-01	27
2011-01-01	26
2012-01-01	30
2013-01-01	31
2014-01-01	28
2015-01-01	36
2016-01-01	18