Year	Number of Firms
1992-01-01	257
1997-01-01	321
2002-01-01	347
2003-01-01	347
2004-01-01	347
2005-01-01	358
2006-01-01	370
2007-01-01	391
2008-01-01	397
2009-01-01	341
2010-01-01	343
2011-01-01	356
2012-01-01	322
2013-01-01	355
2014-01-01	354
2015-01-01	351
2016-01-01	362