Year	Number of Firms
1992-01-01	149
1997-01-01	276
2002-01-01	302
2003-01-01	338
2004-01-01	409
2005-01-01	446
2006-01-01	468
2007-01-01	482
2008-01-01	542
2009-01-01	516
2010-01-01	581
2011-01-01	554
2012-01-01	550
2013-01-01	591
2014-01-01	560
2015-01-01	543
2016-01-01	566