Year	Number of Firms
1997-01-01	5
2002-01-01	6
2003-01-01	3
2004-01-01	5
2005-01-01	11
2006-01-01	9
2007-01-01	12
2008-01-01	14
2009-01-01	13
2010-01-01	15
2011-01-01	21
2012-01-01	21
2013-01-01	22
2014-01-01	17
2015-01-01	21
2016-01-01	23