Definition: According to Investopedia, the currency in circulation of a country is currency that is physically used to conduct transactions between consumers and businesses rather than stored in a bank, financial institution or central bank. Currency in circulation is part of the overall money supply, with a larger portion of the overall supply being stored in checking and savings accounts.
Source: The data is published by the Central Bank of Nigeria in its website
Year Month Currency in Circulation N'million)
2017 January 1,994,577.00
2017 February 1,978,866.00
2017 March 1,983,633.00
2017 April 1,975,812.00
2017 May 1,897,917.00