Year	Number of Firms
1992-01-01	233
1997-01-01	372
2002-01-01	416
2003-01-01	449
2004-01-01	448
2005-01-01	491
2006-01-01	479
2007-01-01	538
2008-01-01	563
2009-01-01	467
2010-01-01	485
2011-01-01	480
2012-01-01	447
2013-01-01	449
2014-01-01	467
2015-01-01	450
2016-01-01	475