Year	Number of Firms
1992-01-01	147
1997-01-01	205
2002-01-01	266
2003-01-01	272
2004-01-01	290
2005-01-01	276
2006-01-01	301
2007-01-01	328
2008-01-01	345
2009-01-01	346
2010-01-01	400
2011-01-01	486
2012-01-01	484
2013-01-01	502
2014-01-01	492
2015-01-01	472
2016-01-01	402