Year	Number of Firms
1992-01-01	29
1997-01-01	28
2002-01-01	25
2003-01-01	21
2004-01-01	29
2005-01-01	26
2006-01-01	25
2007-01-01	30
2008-01-01	25
2009-01-01	24
2010-01-01	17
2011-01-01	25
2012-01-01	18
2013-01-01	16
2014-01-01	14
2015-01-01	13
2016-01-01	16