Year	Number of Firms
1992-01-01	4
1997-01-01	7
2002-01-01	10
2003-01-01	13
2004-01-01	14
2005-01-01	20
2006-01-01	13
2007-01-01	15
2008-01-01	19
2009-01-01	21
2010-01-01	22
2011-01-01	30
2012-01-01	20
2013-01-01	21
2014-01-01	20
2015-01-01	22
2016-01-01	22