Question: When was the first circulation of currency for the country where Balama is located?

full_context: Document 1: Balama: Balama is a town in Balama District of Cabo Delgado Province in northern Mozambique. It is the seat of the district.
Document 2: Euro: The changeover period during which the former currencies' notes and coins were exchanged for those of the euro lasted about two months, until 28 February 2002. The official date on which the national currencies ceased to be legal tender varied from member state to member state. The earliest date was in Germany, where the mark officially ceased to be legal tender on 31 December 2001, though the exchange period lasted for two months more. Even after the old currencies ceased to be legal tender, they continued to be accepted by national central banks for periods ranging from several years to indefinitely (the latter for Austria, Germany, Ireland, Estonia and Latvia in banknotes and coins, and for Belgium, Luxembourg, Slovenia and Slovakia in banknotes only). The earliest coins to become non-convertible were the Portuguese escudos, which ceased to have monetary value after 31 December 2002, although banknotes remain exchangeable until 2022.
Document 3: Palma, Mozambique: Palma is a town on the Indian Ocean coast of Mozambique, lying south of the border with Tanzania. It is known for basketry, for rugmaking and for its offshore islands. It is likely that Palma will become the base of LNG, liquified natural gas, operations for the fast evolving offshore Mozambique natural gas industry.
Document 4: Mozambican metical: The metical (MZM) replaced the escudo at par on 16 June 1980. It was divided into 100 centavos. The metical underwent severe inflation. After the revaluation of the Romanian leu, the metical briefly became the least valued currency unit, at a value of about 24,500 meticais per USD, until the Zimbabwean dollar took the title in late August 2005.
Document 5: Mbala, Zambia: Mbala is Zambia’s most northerly large town and seat of Mbala District, occupying a strategic location close to the border with Tanzania and controlling the southern approaches to Lake Tanganyika, 40 km by road to the north-west, where the port of Mpulungu is located. It had a population of about 20,000 in 2006. Under the name Abercorn, Mbala was a key outpost in British colonial control of this part of south-central Africa. It is headquarters of an administrative district of the Northern Province.
Document 6: Cuamba: Cuamba is a city and district of Niassa Province in Mozambique, lying north west of Mount Namuli. Before independence the town was known as "Nova Freixo" (New Ash).
Document 7: Ancuabe: Ancuabe is a town in eastern Mozambique in Ancuabe District, Cabo Delgado Province. It is the seat of the district. According to the 1997 census it has a population of 12,561.
Document 8: Cape Verdean escudo: In mid-1998 an agreement with Portugal established a pegged rate of 1 Portuguese escudo = 0.55 Cape Verdean escudo. Since the replacement of the Portuguese escudo with the euro, the Cape Verdean escudo has been pegged to the euro at a rate of 1 EUR = 110.265 CVE. This peg is supported by a credit facility from the Portuguese government.
Document 9: Mueda: Mueda is the largest town of the Makonde Plateau in northeastern Mozambique. It is the capital of the Mueda District in Cabo Delgado Province. It is the center of the culture of the Makondes, and the production of their ebony sculptures.
Document 10: Coins of the Indian rupee: The move towards decimalization was afoot for over a century. However, it was in September, 1955 that the Indian Coinage Act was amended for the country to adopt a metric system for coinage. The Act came into force with effect from 1 April 1957, after which anna and pice denominations were demonetised. The rupee remained unchanged in value and nomenclature. It, however, was now divided into 100 'paisa' instead of 16 annas or 64 pice. Effective from 30 June 2011, all coins in denominations of 25 paisa and below were officially demonetized.
Document 11: Pemba, Mozambique: Pemba is a port city in Mozambique. It is the capital of the province of Cabo Delgado and lies on a peninsula in Pemba Bay.
Document 12: Bilene: Bilene, also known as Praia do Bilene, is a town in southern Mozambique, lying 140 kilometres northeast of Maputo in the province of Gaza. It is known as a beach resort, lying on the Mozambique Channel. Noted for its calm and clear lagoon, the Uembje Lagoon, giving way to the pounding Indian Ocean beyond tall dunes, it is reported to be the closest beach destination to the city of Johannesburg in neighboring South Africa.
Document 13: Zimbabwean dollar: The first Zimbabwean dollar was introduced in 1980 and replaced the Rhodesian dollar at par. The initial ISO 4217 code was ZWD. At the time of its introduction, the Zimbabwean dollar was worth more than the US dollar in the official exchange market, with 1 ZWD = 1.47 USD, although this did not reflect the actual purchasing power it held. As a result, in both the official and parallel markets, the currency's value eroded rapidly over the years, and by July 2006, the parallel market value of the Zimbabwean dollar fell to Z $1,000,000 = GB £1.
Document 14: Cape Verdean escudo: After independence on 5 July 1975, notes were issued for 100, 500, and 1000 escudos on 1 July 1977. The next series of notes was introduced in 1989 and consisted of 100, 200, 500, 1000 and 2500 escudos.
Document 15: Spanish peseta: The peseta was replaced by the euro in 2002, following the establishment of the euro in 1999. The exchange rate was 1 euro = 166.386 pesetas.
ground_truth: 16 June 1980
sub_queries: Balama >> country Answer: Mozambique
when did the currencies of Mozambique first come in circulation Answer: 16 June 1980