paragraph_text: Tehran is the country's capital and largest city, as well as its leading cultural and economic center. Iran is a major regional and middle power, exerting considerable influence in international energy security and the world economy through its large reserves of fossil fuels, which include the largest natural gas supply in the world and the fourth-largest proven oil reserves. Iran's rich cultural legacy is reflected in part by its 19 UNESCO World Heritage Sites, the fourth-largest number in Asia and 12th-largest in the world.

paragraph_text: June 17–19, 2010During Petersburg Economic Forum, President of the Russian Federation D.A. Medvedev visited the exhibit of the Commission on modernization and technological development of the economy of Russia, where he watched the demonstration of Corporation’s developments in the field of 3D TV, namely, the first Russian 3D channel – 3DV.

paragraph_text: The top reserve currency is generally selected by the banking community for the strength and stability of the economy in which it is used. Thus, as a currency becomes less stable, or its economy becomes less dominant, bankers may over time abandon it for a currency issued by a larger or more stable economy. This can take a relatively long time, as recognition is important in determining a reserve currency. For example, it took many years after the United States overtook the United Kingdom as the world's largest economy before the dollar overtook the pound sterling as the dominant global reserve currency. In 1944, when the US dollar was chosen as the world reference currency at Bretton Woods, it was only the second currency in global reserves.

paragraph_text: Petroleum was discovered on 3 March 1938 and followed up by several other finds in the Eastern Province. Saudi Arabia has since become the world's second largest oil producer (behind the US) and the world's largest oil exporter, controlling the world's second largest oil reserves and the sixth largest gas reserves. The kingdom is categorized as a World Bank high-income economy with a high Human Development Index and is the only Arab country to be part of the G-20 major economies. The state has attracted criticism for a variety of reasons including: its archaic treatment of women, its excessive and often extrajudicial use of capital punishment, state-sponsored discrimination against religious minorities and atheists, its role in the Yemeni Civil War, sponsorship of Islamic terrorists, and its strict interpretation of Sharia law. The kingdom has the world's third-highest military expenditure and, according to SIPRI, was the world's second largest arms importer from 2010 to 2014. Saudi Arabia is considered a regional and middle power. In addition to the GCC, it is an active member of the Organisation of Islamic Cooperation and OPEC.

paragraph_text: Mali (; ), officially the Republic of Mali (), is a landlocked country in West Africa. Mali is the eighth-largest country in Africa, with an area of just over . The population of Mali is /1e6 round 1 million. 67% of its population was estimated to be under the age of 25 in 2017. Its capital is Bamako. The sovereign state of Mali consists of eight regions and its borders on the north reach deep into the middle of the Sahara Desert, while the country's southern part, where the majority of inhabitants live, features the Niger and Senegal rivers. The country's economy centers on agriculture and mining. Some of Mali's prominent natural resources include gold, being the third largest producer of gold in the African continent, and salt.

paragraph_text: The Sam Nunn Atlanta Federal Center is the ninth largest federal building in the United States and the largest in the southeast. The building houses 5,000 employees for dozens of federal agencies and combines four distinct structural elements in central downtown, equaling .

paragraph_text: Seattle's economy is driven by a mix of older industrial companies, and "new economy" Internet and technology companies, service, design and clean technology companies. The city's gross metropolitan product was $231 billion in 2010, making it the 11th largest metropolitan economy in the United States. The Port of Seattle, which also operates Seattle–Tacoma International Airport, is a major gateway for trade with Asia and cruises to Alaska, and is the 8th largest port in the United States in terms of container capacity. Though it was affected by the Great Recession, Seattle has retained a comparatively strong economy, and remains a hotbed for start-up businesses, especially in green building and clean technologies: it was ranked as America's No. 1 "smarter city" based on its government policies and green economy. In February 2010, the city government committed Seattle to becoming North America's first "climate neutral" city, with a goal of reaching zero net per capita greenhouse gas emissions by 2030.

paragraph_text: The region's economy greatly depends on agriculture; rice and rubber have long been prominent exports. Manufacturing and services are becoming more important. An emerging market, Indonesia is the largest economy in this region. Newly industrialised countries include Indonesia, Malaysia, Thailand, and the Philippines, while Singapore and Brunei are affluent developed economies. The rest of Southeast Asia is still heavily dependent on agriculture, but Vietnam is notably making steady progress in developing its industrial sectors. The region notably manufactures textiles, electronic high-tech goods such as microprocessors and heavy industrial products such as automobiles. Oil reserves in Southeast Asia are plentiful.

paragraph_text: The Mali Federation () was a federation in West Africa linking the French colonies of Senegal and the Sudanese Republic (or French Sudan) for a period of only two months in 1960. It was founded on 4 April 1959 as a territory with self-rule within the French Community and became independent after negotiations with France on 20 June 1960. Two months later, on 19 August 1960, the Sudanese Republic leaders in the Mali Federation mobilized the army and Senegal leaders in the federation retaliated by mobilizing the gendarmerie (national police) which resulted in a tense stand-off and the withdrawal from the federation by Senegal the next day. The Sudanese Republic officials resisted this dissolution, cut off diplomatic relations with Senegal, and defiantly changed the name of their country to Mali. For the brief existence of the Mali Federation, the premier was Modibo Keïta, who would become the first President of the Republic of Mali after the Mali Federation dissolved, and its government was based in Dakar, Senegal.

paragraph_text: On a total scale the region has approximately 34,700,201 inhabitants who are spread among 30,000 islands in the South Pacific bordered between Asia and the Americas. This region has a diverse mix of economies from the highly developed and globally competitive financial market of Australia to the much less developed economies that belong to many of its island neighbours. New Zealand is the only other developed country in the region, although the economy of Australia is by far the largest and most dominant economy in the region and one of the largest in the world.

paragraph_text: Law and finance have long been driving forces in the economy. The city is home to both the United States Court of Appeals for the Fourth Circuit, one of 13 United States courts of appeals, and the Federal Reserve Bank of Richmond, one of 12 Federal Reserve Banks, as well as offices for international companies such as Genworth Financial, CapitalOne, Philip Morris USA, and numerous other banks and brokerages. Richmond is also home to four of the largest law firms in the United States: Hunton & Williams, McGuireWoods, Williams Mullen, and LeClairRyan. Another law firm with a major Richmond presence is Troutman Sanders, which merged with Richmond-based Mays & Valentine LLP in 2001.

paragraph_text: Economic liberalisation, begun in 1991, has caused India to become a fast growing major economy and a newly industrialised country.  Its gross domestic product ranks sixth in the world in market exchange rates and third in purchasing power parity.  Its per capita income ranks 133rd and 116th in the two measures.   India faces challenges of poverty, corruption, malnutrition, and inadequate public healthcare.  A nuclear weapons state and regional power, it has the second largest active military in the world and ranks high in military expenditure. India is a secular, federal republic, governed in a democratic parliamentary system, and administered in 29 states and seven union territories.  A pluralistic, multilingual and multi-ethnic society, India is home to 1.3 billion people.  It is also home to a high diversity of wildlife in a variety of protected habitats.

paragraph_text: The state has the 12th-largest state economy in Mexico, accounting for 2.7% of the country’s GDP. Chihuahua has the fifth highest manufacturing GDP in Mexico and ranks second for the most factories funded by foreign investment in the country. As of 2011[update], the state had an estimated 396 billion pesos (31.1 billion dollars) of annual GDP. According to official federal statistical studies, the service sector accounted for the largest portion of the state economy at 59.28%; the manufacturing and industrial sector is estimated to account for 34.36% of the state's GDP, with the agricultural sector accounting for 6.36% of the state's GDP. Manufacturing sector was the principal foreign investment in the state followed by the mining sector. In 2011, the state received approximately 884 million dollars in remittances from the United States, which was 4.5% of all remittances from the United States to Mexico.

paragraph_text: Date Events Map 1960 - 1963 At the time of independence in 1960, Nigeria was a Federal State of three Regions: Northern, Western, and Eastern. Additionally, provinces, which were a legacy of colonial times, remained extant until they were abolished in 1976. 1963 - 1967 In 1963, two provinces were detached from the Western Region to form the new Mid-Western Region. 1967 - 1976 In 1967, the regions were replaced by 12 states due to a military decree; only the former Mid-Western Region escaped division, and formed a single state following the restructuring. From 1967 to 1970 the areas of Mid-Western State and the Eastern Region attempted to secede, as a nation called Biafra during the Nigerian civil war. 1976 - 1987 In 1976, seven new states were created, making 19 altogether. 1987 - 1991 During this period, there were 21 states and later, Abuja, the Federal Capital Territory. 1991 - 1996 During this period, there were 30 states and the Federal Capital Territory. The Federal Capital Territory was established in 1991. In 1987 two new states were established, followed by another nine in 1991, bringing the total to 30. The latest change, in 1996, resulted in the present number of 36 states.

paragraph_text: The Federal Government of Nigeria is the federal government for the Federal Republic of Nigeria, a federation in West Africa, composed of 36 states, who share sovereignty with the federal government and 1 federal territory administered solely by the federal government. The federal government is composed of three distinct branches: legislative, executive, and judicial, whose powers are vested by the Constitution of Nigeria in the National Assembly, the President, and the federal courts, including the Supreme Court, respectively.

paragraph_text: The Andrew Carpenter House on State Road 1820 in Gaston County, North Carolina, is believed to have been built for Andrew Carpenter shortly after his marriage to Sophia Smith on April 19, 1831. The two-story Federal style plantation house is two rooms deep and has paired chimneys. It is one of the largest early-19th century houses in Gaston County.

paragraph_text: As of 2015[update], Nigeria is the world's 20th largest economy, worth more than $500 billion and $1 trillion in terms of nominal GDP and purchasing power parity respectively. It overtook South Africa to become Africa's largest economy in 2014. Also, the debt-to-GDP ratio is only 11 percent, which is 8 percent below the 2012 ratio. Nigeria is considered to be an emerging market by the World Bank; It has been identified as a regional power on the African continent, a middle power in international affairs, and has also been identified as an emerging global power. Nigeria is a member of the MINT group of countries, which are widely seen as the globe's next "BRIC-like" economies. It is also listed among the "Next Eleven" economies set to become among the biggest in the world. Nigeria is a founding member of the Commonwealth of Nations, the African Union, OPEC, and the United Nations amongst other international organisations.

paragraph_text: The foundation for the influential position held by Germany today was laid during the Wirtschaftswunder (economic miracle) of the 1950s when West Germany rose from the enormous destruction wrought by World War II to become the world's third - largest economy. The first chancellor Konrad Adenauer, who remained in office until 1963, had worked for a full alignment with NATO rather than neutrality. He not only secured a membership in NATO but was also a proponent of agreements that developed into the present - day European Union. When the G6 was established in 1975, there was no question whether the Federal Republic of Germany would be a member as well.

paragraph_text: Richmond's economy is primarily driven by law, finance, and government, with federal, state, and local governmental agencies, as well as notable legal and banking firms, located in the downtown area. The city is home to both the United States Court of Appeals for the Fourth Circuit, one of 13 United States courts of appeals, and the Federal Reserve Bank of Richmond, one of 12 Federal Reserve Banks. Dominion Resources and MeadWestvaco, Fortune 500 companies, are headquartered in the city, with others in the metropolitan area.

paragraph_text: During the 1990s after NAFTA was signed, industrial development grew rapidly with foreign investment. Large factories known as maquiladoras were built to export manufactured goods to the United States and Canada. Today, most of the maquiladoras produce electronics, automobile, and aerospace components. There are more than 406 companies operating under the federal IMMEX or Prosec program in Chihuahua. The large portion of the manufacturing sector of the state is 425 factories divided into 25 industrial parks accounting for 12.47% of the maquiladoras in Mexico, which employ 294,026 people in the state. While export-driven manufacturing is one of the most important components of the state's economy, the industrial sector is quite diverse and can be broken down into several sectors, which are: electronics, agro-industrial, wood base manufacturing, mineral, and biotech. Similar to the rest of the country, small businesses continue to be the foundation of the state’s economy. Small business employs the largest portion of the population.[citation needed]

Question: When did the country with the largest economy in Africa become a federation of 19 states?
Answer: 1976