Year	Number of Firms
1992-01-01	35
1997-01-01	47
2002-01-01	37
2003-01-01	38
2004-01-01	39
2005-01-01	43
2006-01-01	42
2007-01-01	41
2008-01-01	39
2009-01-01	33
2010-01-01	48
2011-01-01	47
2012-01-01	38
2013-01-01	25
2014-01-01	38
2015-01-01	31
2016-01-01	29