Year	Number of Firms
1992-01-01	316
1997-01-01	388
2002-01-01	459
2003-01-01	495
2004-01-01	473
2005-01-01	523
2006-01-01	497
2007-01-01	526
2008-01-01	579
2009-01-01	536
2010-01-01	578
2011-01-01	598
2012-01-01	583
2013-01-01	590
2014-01-01	573
2015-01-01	565
2016-01-01	567