Year	Number of Firms
1997-01-01	2
2002-01-01	13
2003-01-01	15
2004-01-01	16
2005-01-01	19
2006-01-01	21
2007-01-01	24
2008-01-01	28
2009-01-01	28
2010-01-01	41
2011-01-01	43
2012-01-01	42
2013-01-01	44
2014-01-01	41
2015-01-01	44
2016-01-01	28