Year	Number of Firms
1992-01-01	29
1997-01-01	46
2002-01-01	49
2003-01-01	52
2004-01-01	48
2005-01-01	37
2006-01-01	48
2007-01-01	49
2008-01-01	48
2009-01-01	51
2010-01-01	47
2011-01-01	42
2012-01-01	36
2013-01-01	41
2014-01-01	34
2015-01-01	42
2016-01-01	40