Year	Number of Firms
1992-01-01	72
1997-01-01	166
2002-01-01	198
2003-01-01	256
2004-01-01	288
2005-01-01	328
2006-01-01	412
2007-01-01	516
2008-01-01	606
2009-01-01	492
2010-01-01	525
2011-01-01	539
2012-01-01	557
2013-01-01	511
2014-01-01	552
2015-01-01	557
2016-01-01	553