Year	Number of Firms
1997-01-01	5
2002-01-01	3
2003-01-01	3
2004-01-01	9
2005-01-01	18
2006-01-01	26
2007-01-01	36
2008-01-01	28
2009-01-01	30
2010-01-01	35
2011-01-01	32
2012-01-01	28
2013-01-01	26
2014-01-01	28
2015-01-01	33
2016-01-01	29