Year	Number of Firms
1992-01-01	29
1997-01-01	39
2002-01-01	48
2003-01-01	58
2004-01-01	58
2005-01-01	49
2006-01-01	67
2007-01-01	68
2008-01-01	73
2009-01-01	61
2010-01-01	60
2011-01-01	60
2012-01-01	64
2013-01-01	62
2014-01-01	57
2015-01-01	57
2016-01-01	70