Year	Number of Firms
1992-01-01	253
1997-01-01	338
2002-01-01	368
2003-01-01	400
2004-01-01	419
2005-01-01	417
2006-01-01	431
2007-01-01	539
2008-01-01	545
2009-01-01	471
2010-01-01	484
2011-01-01	499
2012-01-01	495
2013-01-01	455
2014-01-01	486
2015-01-01	485
2016-01-01	467