Question: When did the currency change to the us dollar in the country that provided the most legal immigrants in 2013 on the continent containing Paraguay?

full_context: Document 1: Mexico City: On the other hand, Mexico City is also home to large communities of expatriates and immigrants, most notably from the rest of North America (U.S. and Canada), from South America (mainly from Argentina and Colombia, but also from Brazil, Chile, Uruguay and Venezuela), from Central America and the Caribbean (mainly from Cuba, Guatemala, El Salvador, Haiti and Honduras); from Europe (mainly from Spain, Germany and Switzerland, but also from Czech Republic, Hungary, France, Italy, Ireland, the Netherlands, Poland and Romania), from the Middle East (mainly from Egypt, Lebanon and Syria); and recently from Asia-Pacific (mainly from China and South Korea). Historically since the era of New Spain, many Filipinos settled in the city and have become integrated in Mexican society. While no official figures have been reported, population estimates of each of these communities are quite significant.
Document 2: San Ignacio de Loyola International Bridge: The San Ignacio de Loyola International Bridge (Spanish: Puente Internacional San Ignacio de Loyola) is a road bridge that crosses the border between Argentina and Paraguay over the Pilcomayo River, from the Argentine city of Clorinda, to José Falcón, near Asunción, Paraguay's capital.
Document 3: New York City: The wider New York City metropolitan area, with over 20 million people, about 50% greater than the second-place Los Angeles metropolitan area in the United States, is also ethnically diverse. The New York region continues to be by far the leading metropolitan gateway for legal immigrants admitted into the United States, substantially exceeding the combined totals of Los Angeles and Miami, the next most popular gateway regions. It is home to the largest Jewish as well as Israeli communities outside Israel, with the Jewish population in the region numbering over 1.5 million in 2012 and including many diverse Jewish sects from around the Middle East and Eastern Europe. The metropolitan area is also home to 20% of the nation's Indian Americans and at least 20 Little India enclaves, as well as 15% of all Korean Americans and four Koreatowns; the largest Asian Indian population in the Western Hemisphere; the largest Russian American, Italian American, and African American populations; the largest Dominican American, Puerto Rican American, and South American and second-largest overall Hispanic population in the United States, numbering 4.8 million; and includes at least 6 established Chinatowns within New York City alone, with the urban agglomeration comprising a population of 779,269 overseas Chinese as of 2013 Census estimates, the largest outside of Asia.
Document 4: Paraguay: Paraguay is a representative democratic republic, with a multi-party system and separation of powers in three branches. Executive power is exercised solely by the President, who is head of state and head of government. Legislative power is vested in the two chambers of the National Congress. The judiciary is vested on tribunals and Courts of Civil Law and a nine-member Supreme Court of Justice, all of them independent of the executive and the legislature.
Document 5: Currencies of Puerto Rico: The situado was discontinued during the 19th century, creating an economic crisis, as a result of Mexico gaining its independence from Spain. Salvador Meléndez Bruna, the colonial governor in office, ordered the issue of provincial banknotes, creating the Puerto Rican peso. However, printing of these banknotes ceased after 1815. During the following decades, foreign coins became the widespread currency. In the 1860s and 1870s, banknotes reemerged. On February 1, 1890, the Banco Español de Puerto Rico was inaugurated and began issuing banknotes. The bank designed four series and placed three in circulation under Spanish rule. In 1895, a Royal Decree ordered the production of provincial peso coins.
Document 6: Paraguay River: The Paraguay River (Río Paraguay in Spanish, Rio Paraguai in Portuguese, Ysyry Paraguái in Guarani) is a major river in south-central South America, running through Brazil, Bolivia, Paraguay and Argentina. It flows about from its headwaters in the Brazilian state of Mato Grosso to its confluence with the Paraná River north of Corrientes and Resistencia.
Document 7: New York City: Ecuador, Colombia, Guyana, Peru, and Brazil were the top source countries from South America for legal immigrants to the New York City region in 2013; the Dominican Republic, Jamaica, Haiti, and Trinidad and Tobago in the Caribbean; Egypt, Ghana, and Nigeria from Africa; and El Salvador, Honduras, and Guatemala in Central America. Amidst a resurgence of Puerto Rican migration to New York City, this population had increased to approximately 1.3 million in the metropolitan area as of 2013.
Document 8: New York City: Approximately 37% of the city's population is foreign born. In New York, no single country or region of origin dominates. The ten largest sources of foreign-born individuals in the city as of 2011 were the Dominican Republic, China, Mexico, Guyana, Jamaica, Ecuador, Haiti, India, Russia, and Trinidad and Tobago, while the Bangladeshi immigrant population has since become one of the fastest growing in the city, counting over 74,000 by 2013.
Document 9: Currency of Ecuador: The US dollar became legal tender in Ecuador March 13, 2000, and sucre notes ceased being legal tender on September 11. Sucre notes remained exchangeable at Banco Central until March 30, 2001, at 25,000 sucres per dollar. Ecuador now only issues its own centavo coins.
Document 10: Paris: The remaining group, people born in foreign countries with no French citizenship at birth, are those defined as immigrants under French law. According to the 2012 census, 135,853 residents of the city of Paris were immigrants from Europe, 112,369 were immigrants from the Maghreb, 70,852 from sub-Saharan Africa and Egypt, 5,059 from Turkey, 91,297 from Asia (outside Turkey), 38,858 from the Americas, and 1,365 from the South Pacific. Note that the immigrants from the Americas and the South Pacific in Paris are vastly outnumbered by migrants from French overseas regions and territories located in these regions of the world.
Document 11: 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 12: Paraguay: Paraguay (; ; , ), officially the Republic of Paraguay (; ), is a country in South America. It is bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest. Although it is one of only two landlocked countries in South America (the other is Bolivia), the country has coasts, beaches and ports on the Paraguay and Paraná rivers that give exit to the Atlantic Ocean through the . Due to its central location in South America, it is sometimes referred to as "Corazón de Sudamérica" ("Heart of South America").
Document 13: Bermuda: In 1970 the country switched its currency from the Bermudian pound to the Bermudian dollar, which is pegged at par with the US dollar. US notes and coins are used interchangeably with Bermudian notes and coins within the islands for most practical purposes; however, banks levy an exchange rate fee for the purchase of US dollars with Bermudian dollars. Bermudian notes carry the image of Queen Elizabeth II. The Bermuda Monetary Authority is the issuing authority for all banknotes and coins, and regulates financial institutions. The Royal Naval Dockyard Museum holds a permanent exhibition of Bermuda notes and coins.
Document 14: South America: It is bordered on the west by the Pacific Ocean and on the north and east by the Atlantic Ocean; North America and the Caribbean Sea lie to the northwest. It includes twelve sovereign states (Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela), a part of France (French Guiana), and a non-sovereign area (the Falkland Islands, a British Overseas Territory though this is disputed by Argentina). In addition to this, the ABC islands of the Kingdom of the Netherlands, Trinidad and Tobago, and Panama may also be considered part of South America.
Document 15: Salvadoran colón: The colón was the currency of El Salvador between 1892 and 2001, until it was replaced by the U.S. Dollar. It was subdivided into 100 centavos and its ISO 4217 code was SVC. The plural is colones in Spanish and was named after Christopher Columbus, known as Cristóbal Colón in Spanish.
ground_truth: March 13, 2000
sub_queries: What continent contains Paraguay? Answer: South America
Of all the countries in South America , which provided the most legal immigrants in 2013? Answer: Ecuador
when did Ecuador change to the us dollar Answer: March 13, 2000