Year	Number of Firms
1992-01-01	305
1997-01-01	469
2002-01-01	442
2003-01-01	416
2004-01-01	416
2005-01-01	444
2006-01-01	425
2007-01-01	460
2008-01-01	483
2009-01-01	441
2010-01-01	476
2011-01-01	495
2012-01-01	497
2013-01-01	455
2014-01-01	489
2015-01-01	472
2016-01-01	455