Year	Number of Firms
1997-01-01	3
2002-01-01	6
2003-01-01	5
2004-01-01	4
2005-01-01	10
2006-01-01	10
2007-01-01	14
2008-01-01	11
2009-01-01	18
2010-01-01	17
2011-01-01	19
2012-01-01	18
2013-01-01	19
2014-01-01	18
2015-01-01	22
2016-01-01	17