Year	Number of Firms
1997-01-01	23
2002-01-01	36
2003-01-01	34
2004-01-01	27
2005-01-01	27
2006-01-01	29
2007-01-01	31
2008-01-01	32
2009-01-01	35
2010-01-01	34
2011-01-01	42
2012-01-01	36
2013-01-01	29
2014-01-01	33
2015-01-01	28
2016-01-01	26