Year	Number of Firms
1997-01-01	23
2002-01-01	29
2003-01-01	28
2004-01-01	24
2005-01-01	36
2006-01-01	41
2007-01-01	48
2008-01-01	55
2009-01-01	48
2010-01-01	49
2011-01-01	54
2012-01-01	46
2013-01-01	50
2014-01-01	53
2015-01-01	46
2016-01-01	55