https://nairametrics.com/2014/03/17/interbank-rates-rose-to-18-5-on-friday-18th-march/
Interbank Rates Rose To 18.5% on Friday 18th March - Nairametrics
Aug 1, 2015 - The Nigerian Interbank Offered Rates (NIBOR) increased significantly to an average of 18.5 per cent on Friday, as against the
5 on fridayto 1818th marchinterbankrates