Year	Number of Firms
1992-01-01	397
1997-01-01	571
2002-01-01	503
2003-01-01	538
2004-01-01	520
2005-01-01	503
2006-01-01	499
2007-01-01	554
2008-01-01	576
2009-01-01	565
2010-01-01	575
2011-01-01	577
2012-01-01	537
2013-01-01	553
2014-01-01	577
2015-01-01	571
2016-01-01	578