Year	Number of Firms
1992-01-01	13
1997-01-01	16
2002-01-01	20
2003-01-01	22
2004-01-01	32
2005-01-01	51
2006-01-01	44
2007-01-01	51
2008-01-01	43
2009-01-01	45
2010-01-01	48
2011-01-01	39
2012-01-01	42
2013-01-01	40
2014-01-01	38
2015-01-01	35
2016-01-01	45