Year	Number of Firms
1992-01-01	372
1997-01-01	601
2002-01-01	560
2003-01-01	565
2004-01-01	616
2005-01-01	577
2006-01-01	558
2007-01-01	577
2008-01-01	580
2009-01-01	568
2010-01-01	591
2011-01-01	605
2012-01-01	604
2013-01-01	604
2014-01-01	585
2015-01-01	588
2016-01-01	566