Year	Number of Firms
1997-01-01	16
2002-01-01	28
2003-01-01	30
2004-01-01	35
2005-01-01	31
2006-01-01	39
2007-01-01	40
2008-01-01	42
2009-01-01	44
2010-01-01	47
2011-01-01	46
2012-01-01	45
2013-01-01	52
2014-01-01	43
2015-01-01	50
2016-01-01	57