Year	Number of Firms
1992-01-01	112
1997-01-01	147
2002-01-01	148
2003-01-01	134
2004-01-01	147
2005-01-01	147
2006-01-01	141
2007-01-01	143
2008-01-01	153
2009-01-01	176
2010-01-01	167
2011-01-01	171
2012-01-01	165
2013-01-01	156
2014-01-01	166
2015-01-01	164
2016-01-01	156