Year	Number of Firms
1992-01-01	4
1997-01-01	27
2002-01-01	46
2003-01-01	52
2004-01-01	72
2005-01-01	86
2006-01-01	91
2007-01-01	142
2008-01-01	242
2009-01-01	142
2010-01-01	184
2011-01-01	259
2012-01-01	247
2013-01-01	306
2014-01-01	295
2015-01-01	242
2016-01-01	246