Year	Number of Firms
1992-01-01	18
1997-01-01	24
2002-01-01	19
2003-01-01	20
2004-01-01	19
2005-01-01	23
2006-01-01	23
2007-01-01	23
2008-01-01	18
2009-01-01	27
2010-01-01	26
2011-01-01	26
2012-01-01	16
2013-01-01	23
2014-01-01	20
2015-01-01	17
2016-01-01	21