Year	Number of Firms
1992-01-01	4
1997-01-01	12
2002-01-01	18
2003-01-01	16
2004-01-01	22
2005-01-01	24
2006-01-01	22
2007-01-01	41
2008-01-01	41
2009-01-01	43
2010-01-01	38
2011-01-01	43
2012-01-01	41
2013-01-01	41
2014-01-01	46
2015-01-01	48
2016-01-01	51