Year	Number of Firms
1992-01-01	4
1997-01-01	11
2002-01-01	20
2003-01-01	11
2004-01-01	12
2005-01-01	15
2006-01-01	18
2007-01-01	17
2008-01-01	18
2009-01-01	25
2010-01-01	21
2011-01-01	29
2012-01-01	28
2013-01-01	22
2014-01-01	22
2015-01-01	20
2016-01-01	21