Year	Number of Firms
1992-01-01	231
1997-01-01	235
2002-01-01	258
2003-01-01	270
2004-01-01	257
2005-01-01	258
2006-01-01	266
2007-01-01	294
2008-01-01	321
2009-01-01	269
2010-01-01	261
2011-01-01	270
2012-01-01	259
2013-01-01	251
2014-01-01	259
2015-01-01	257
2016-01-01	240