Year	Number of Firms
1992-01-01	394
1997-01-01	514
2002-01-01	587
2003-01-01	546
2004-01-01	525
2005-01-01	497
2006-01-01	491
2007-01-01	495
2008-01-01	539
2009-01-01	500
2010-01-01	505
2011-01-01	500
2012-01-01	519
2013-01-01	491
2014-01-01	516
2015-01-01	488
2016-01-01	516