Year	Number of Firms
1997-01-01	2
2002-01-01	9
2003-01-01	8
2004-01-01	8
2005-01-01	11
2006-01-01	13
2007-01-01	16
2008-01-01	20
2009-01-01	17
2010-01-01	20
2011-01-01	23
2012-01-01	32
2013-01-01	30
2014-01-01	24
2015-01-01	23
2016-01-01	31