Year	Number of Firms
1997-01-01	1
2002-01-01	15
2003-01-01	15
2004-01-01	18
2005-01-01	24
2006-01-01	29
2007-01-01	15
2008-01-01	24
2009-01-01	21
2010-01-01	17
2011-01-01	10
2012-01-01	15
2013-01-01	8
2014-01-01	15
2015-01-01	14
2016-01-01	5