Year	Number of Firms
1997-01-01	11
2002-01-01	5
2003-01-01	10
2004-01-01	11
2005-01-01	13
2006-01-01	16
2007-01-01	13
2008-01-01	24
2009-01-01	16
2010-01-01	22
2011-01-01	28
2012-01-01	29
2013-01-01	31
2014-01-01	31
2015-01-01	31
2016-01-01	24