Year	Number of Firms
1992-01-01	47
1997-01-01	179
2002-01-01	183
2003-01-01	193
2004-01-01	191
2005-01-01	223
2006-01-01	231
2007-01-01	259
2008-01-01	309
2009-01-01	295
2010-01-01	267
2011-01-01	288
2012-01-01	251
2013-01-01	230
2014-01-01	232
2015-01-01	257
2016-01-01	258