Year	Number of Firms
1992-01-01	29
1997-01-01	48
2002-01-01	55
2003-01-01	55
2004-01-01	60
2005-01-01	60
2006-01-01	60
2007-01-01	75
2008-01-01	76
2009-01-01	63
2010-01-01	73
2011-01-01	73
2012-01-01	75
2013-01-01	65
2014-01-01	73
2015-01-01	61
2016-01-01	50