Year Number of Firms 1992-01-01 121 1997-01-01 133 2002-01-01 141 2003-01-01 163 2004-01-01 176 2005-01-01 173 2006-01-01 165 2007-01-01 171 2008-01-01 198 2009-01-01 160 2010-01-01 181 2011-01-01 162 2012-01-01 168 2013-01-01 164 2014-01-01 174 2015-01-01 167 2016-01-01 157