Year	Number of Firms
1997-01-01	9
2002-01-01	14
2003-01-01	12
2004-01-01	19
2005-01-01	16
2006-01-01	23
2007-01-01	19
2008-01-01	27
2009-01-01	22
2010-01-01	21
2011-01-01	27
2012-01-01	24
2013-01-01	30
2014-01-01	26
2015-01-01	20
2016-01-01	35