Year	Number of Firms
1992-01-01	262
1997-01-01	479
2002-01-01	272
2003-01-01	324
2004-01-01	399
2005-01-01	407
2006-01-01	455
2007-01-01	483
2008-01-01	529
2009-01-01	489
2010-01-01	525
2011-01-01	547
2012-01-01	500
2013-01-01	486
2014-01-01	515
2015-01-01	500
2016-01-01	499