Year	Number of Firms
1992-01-01	280
1997-01-01	338
2002-01-01	386
2003-01-01	388
2004-01-01	397
2005-01-01	407
2006-01-01	433
2007-01-01	499
2008-01-01	529
2009-01-01	442
2010-01-01	490
2011-01-01	493
2012-01-01	481
2013-01-01	493
2014-01-01	499
2015-01-01	478
2016-01-01	459