Year	Number of Firms
1997-01-01	21
2002-01-01	34
2003-01-01	47
2004-01-01	44
2005-01-01	60
2006-01-01	58
2007-01-01	62
2008-01-01	52
2009-01-01	53
2010-01-01	62
2011-01-01	60
2012-01-01	63
2013-01-01	77
2014-01-01	76
2015-01-01	61
2016-01-01	67