Year	Number of Firms
1992-01-01	59
1997-01-01	134
2002-01-01	224
2003-01-01	253
2004-01-01	281
2005-01-01	332
2006-01-01	347
2007-01-01	392
2008-01-01	434
2009-01-01	470
2010-01-01	502
2011-01-01	524
2012-01-01	554
2013-01-01	553
2014-01-01	546
2015-01-01	547
2016-01-01	574