Year	Number of Firms
1992-01-01	150
1997-01-01	284
2002-01-01	326
2003-01-01	335
2004-01-01	346
2005-01-01	341
2006-01-01	402
2007-01-01	402
2008-01-01	453
2009-01-01	420
2010-01-01	461
2011-01-01	491
2012-01-01	490
2013-01-01	498
2014-01-01	518
2015-01-01	491
2016-01-01	495