Year	Number of Firms
1992-01-01	331
1997-01-01	429
2002-01-01	462
2003-01-01	473
2004-01-01	485
2005-01-01	429
2006-01-01	461
2007-01-01	475
2008-01-01	460
2009-01-01	458
2010-01-01	472
2011-01-01	487
2012-01-01	480
2013-01-01	495
2014-01-01	489
2015-01-01	509
2016-01-01	471