Year	Number of Firms
1992-01-01	355
1997-01-01	454
2002-01-01	422
2003-01-01	431
2004-01-01	465
2005-01-01	453
2006-01-01	469
2007-01-01	506
2008-01-01	500
2009-01-01	488
2010-01-01	510
2011-01-01	511
2012-01-01	516
2013-01-01	527
2014-01-01	546
2015-01-01	510
2016-01-01	546