Year	Number of Firms
1992-01-01	4
1997-01-01	13
2002-01-01	13
2003-01-01	7
2004-01-01	16
2005-01-01	16
2006-01-01	10
2007-01-01	15
2008-01-01	23
2009-01-01	28
2010-01-01	32
2011-01-01	25
2012-01-01	26
2013-01-01	25
2014-01-01	27
2015-01-01	25
2016-01-01	31