Year	Number of Firms
1992-01-01	21
1997-01-01	33
2002-01-01	46
2003-01-01	41
2004-01-01	49
2005-01-01	47
2006-01-01	38
2007-01-01	50
2008-01-01	46
2009-01-01	39
2010-01-01	49
2011-01-01	45
2012-01-01	47
2013-01-01	45
2014-01-01	52
2015-01-01	48
2016-01-01	48