Question: When did the continent where raw stevia comes from become a collection of independent states?

full_context: Document 1: Decolonization of the Americas: The Latin American wars of independence were the revolutions that took place during the late 18th and early 19th centuries and resulted in the creation of a number of independent countries in Latin America. These revolutions followed the American and French Revolutions, which had profound effects on the British, Spanish, Portuguese, and French colonies in the Americas. Haiti, a French slave colony, was the first to follow the United States; the Haitian Revolution lasted from 1791 to 1804, when they won their independence. The Peninsular War with France, which resulted from the Napoleonic occupation of Spain, caused Spanish Creoles in Spanish America to question their allegiance to Spain, stoking independence movements that culminated in the wars of independence, which lasted almost two decades. At the same time, the Portuguese monarchy relocated to Brazil during Portugal's French occupation. After the royal court returned to Lisbon, the prince regent, Pedro, remained in Brazil and in 1822 successfully declared himself emperor of a newly independent Brazil. Cuban independence was fought against Spain in two wars (Ten Years and Little War). Cuba and Puerto Rico remained under Spanish rule until the Spanish -- American War in 1898.
Document 2: Echium plantagineum in Australia: In the 1880s, it was introduced to Australia, probably both as an accidental contaminant of pasture seed and as an ornamental plant. Reportedly, both names for the plant derive from Jane Paterson or Patterson, an early settler of the country near Albury. She brought the first seeds from Europe to beautify a garden, and then could only watch helplessly as the weed infested previously productive pastures for many miles around.
Document 3: Modern history: When the Central Junta fell to the French, numerous new Juntas appeared all across the Americas, eventually resulting in a chain of newly independent countries stretching from Argentina and Chile in the south, to Mexico in the north. After the death of the king Ferdinand VII, in 1833, only Cuba and Puerto Rico remained under Spanish rule, until the Spanish–American War in 1898. Unlike the Spanish, the Portuguese did not divide their colonial territory in America. The captaincies they created were subdued to a centralized administration in Salvador (later relocated to Rio de Janeiro) which reported directly to the Portuguese Crown until its independence in 1822, becoming the Empire of Brazil.
Document 4: Decolonization of the Americas: The Latin American wars of independence were the revolutions that took place during the late 18th and early 19th centuries and resulted in the creation of a number of independent countries in Latin America. These revolutions followed the American and French Revolutions, which had profound effects on the British, Spanish, Portuguese, and French colonies in the Americas. Haiti, a French slave colony, was the first to follow the United States; the Haitian Revolution lasted from 1791 to 1804, when they won their independence. The Peninsular War with France, which resulted from the Napoleonic occupation of Spain, caused Spanish Creoles in Spanish America to question their allegiance to Spain, stoking independence movements that culminated in the wars of independence, which lasted almost two decades. At the same time, the Portuguese monarchy relocated to Brazil during Portugal's French occupation. After the royal court returned to Lisbon, the prince regent, Pedro, remained in Brazil and in 1822 successfully declared himself emperor of a newly independent Brazil.
Document 5: Poinsettia: The poinsettia (/ pɔɪnˈsɛtiə / or / pɔɪnˈsɛtə /) (Euphorbia pulcherrima) is a commercially important plant species of the diverse spurge family (Euphorbiaceae). The species is indigenous to Mexico. It is particularly well known for its red and green foliage and is widely used in Christmas floral displays. It derives its common English name from Joel Roberts Poinsett, the first United States Minister to Mexico, who introduced the plant to the US in 1825.
Document 6: History of Bolivia: After the fall of Tiwanaku empire, the many Aymara Lake Titicaca were conquered by the Inca empire. Prior to the Spanish conquest, the Andean province of Qullasuyu was a part of the Inca empire, while the northern and eastern lowlands were inhabited by independent nomadic tribes. Spanish conquistadors, arriving from Cuzco and Asunción took control of the region in the 16th century. During most of the Spanish colonial rule, Bolivia was known as Upper Peru and administered by the Royal Audiencia of Charcas. After the first call for independence in 1809, 16 years of war followed before the establishment of the Bolivian Republic, named for the Liberator Simón Bolívar, on August 6, 1825. Since then Bolivia has endured regular periods of political and economic instability, including the loss of various provinces to its neighbors, such as Acre, parts of the Gran Chaco and its Pacific coast, making it a land - locked country.
Document 7: Haiti: The island was named La Española and claimed by Spain, which ruled until the early 17th century. Competing claims and settlements by the French led to the western portion of the island being ceded to France, which named it Saint-Domingue. Sugarcane plantations, worked by slaves brought from Africa, were established by colonists.
Document 8: Grewia asiatica: It is extensively cultivated for its sweet and sour acidic fruit, which are sold in the market during summer months under the name falsa. The sherbet or squash is prepared from the fruit pulp by mixing it with sugar and used as an astringent, stomachic and cooling agent.
Document 9: History of South America: The Spanish colonies won their independence in the first quarter of the 19th century, in the Spanish American wars of independence. Simón Bolívar (Greater Colombia, Peru, Bolivia), José de San Martín (United Provinces of the River Plate, Chile, and Peru), and Bernardo O'Higgins (Chile) led their independence struggle. Although Bolivar attempted to keep the Spanish - speaking parts of the continent politically unified, they rapidly became independent of one another.
Document 10: Simón Bolívar: Simón José Antonio de la Santísima Trinidad de Bolívar y Palacios (Spanish: (siˈmon boˈliβar) (listen); 24 July 1783 -- 17 December 1830), generally known as Simón Bolívar and also colloquially as El Libertador, was a Venezuelan military and political leader who played a leading role in the establishment of Venezuela, Bolivia, Colombia, Ecuador, Peru, and Panama as sovereign states, independent of Spanish rule.
Document 11: Botany: Botany originated in prehistory as herbalism with the efforts of early humans to identify – and later cultivate – edible, medicinal and poisonous plants, making it one of the oldest branches of science. Medieval physic gardens, often attached to monasteries, contained plants of medical importance. They were forerunners of the first botanical gardens attached to universities, founded from the 1540s onwards. One of the earliest was the Padua botanical garden. These gardens facilitated the academic study of plants. Efforts to catalogue and describe their collections were the beginnings of plant taxonomy, and led in 1753 to the binomial system of Carl Linnaeus that remains in use to this day.
Document 12: Botany: Another work from Ancient Greece that made an early impact on botany is De Materia Medica, a five-volume encyclopedia about herbal medicine written in the middle of the first century by Greek physician and pharmacologist Pedanius Dioscorides. De Materia Medica was widely read for more than 1,500 years. Important contributions from the medieval Muslim world include Ibn Wahshiyya's Nabatean Agriculture, Abū Ḥanīfa Dīnawarī's (828–896) the Book of Plants, and Ibn Bassal's The Classification of Soils. In the early 13th century, Abu al-Abbas al-Nabati, and Ibn al-Baitar (d. 1248) wrote on botany in a systematic and scientific manner.
Document 13: Stevia: The plant Stevia rebaudiana has been used for more than 1,500 years by the Guaraní peoples of South America, who called it ka'a he'ê (``sweet herb ''). The leaves have been used traditionally for hundreds of years in both Brazil and Paraguay to sweeten local teas and medicines, and as a`` sweet treat''. The genus was named for Spanish botanist and physician Petrus Jacobus Stevus (Pedro Jaime Esteve 1500 -- 1556), a professor of botany at the University of Valencia.
Document 14: Saint Barthélemy: Other trees of note include the royal palm, sea grape trees in the form of shrubs on the beaches and as 5 to 7 m trees in the interior areas of the island, aloe or aloe vera (brought from the Mediterranean), the night blooming cereus, mamillaria nivosa, yellow prickly pear or barbary fig which was planted as barbed wire defences against invading British army in 1773, Mexican cactus, stapelia gigantea, golden trumpet or yellow bell which was originally from South America, bougainvillea and others.
Document 15: Decolonization of the Americas: The Latin American wars of independence were the revolutions that took place during the late 18th and early 19th centuries and resulted in the creation of a number of independent countries in Latin America. These revolutions followed the American and French Revolutions, which had profound effects on the British, Spanish, Portuguese, and French colonies in the Americas. Haiti, a French slave colony, was the first to follow the United States; the Haitian Revolution lasted from 1791 to 1804, when they won their independence. From this emerged Napoleon Bonaparte as French ruler, whose armies set out to conquer Europe, including Spain and Portugal in 1808. The Peninsular War with France, which resulted from the Napoleonic occupation of Spain, caused Spanish Creoles in Spanish America to question their allegiance to Spain, stoking independence movements that culminated in the wars of independence, which lasted almost two decades. At the same time, the Portuguese monarchy relocated to Brazil during Portugal's French occupation. After the royal court returned to Lisbon, the prince regent, Pedro, remained in Brazil and in 1822 successfully declared himself emperor of a newly independent Brazil.
ground_truth: the first quarter of the 19th century
sub_queries: where does stevia in the raw come from Answer: South America
South America became a collection of independent states between Answer: the first quarter of the 19th century