Year	Number of Firms
1992-01-01	4
1997-01-01	14
2002-01-01	14
2003-01-01	14
2004-01-01	22
2005-01-01	20
2006-01-01	25
2007-01-01	29
2008-01-01	32
2009-01-01	22
2010-01-01	36
2011-01-01	32
2012-01-01	35
2013-01-01	34
2014-01-01	30
2015-01-01	31
2016-01-01	27