paragraph_text: Despite the lack of a coastline, Punjab is the most industrialised province of Pakistan; its manufacturing industries produce textiles, sports goods, heavy machinery, electrical appliances, surgical instruments, vehicles, auto parts, metals, sugar mill plants, aircraft, cement, agricultural machinery, bicycles and rickshaws, floor coverings, and processed foods. In 2003, the province manufactured 90% of the paper and paper boards, 71% of the fertilizers, 69% of the sugar and 40% of the cement of Pakistan.

paragraph_text: Es Teler is a fruit cocktail from Indonesia. Avocado, coconut meat, cincau, jackfruit and other fruits are served with coconut milk, sweetened condensed milk, "Pandanus amaryllifolius" leaf (normally in the form of cocopandan syrup), sugar, and a tiny amount of salt.

paragraph_text: Iowa, the largest producer of corn in the US, grows three times as much corn as Mexico. Iowa harvested 3,548 acres (1,436 ha) of sweet corn in 2007. In 2011, the state had 92,300 corn farms on 30,700,000 acres (12,400,000 ha), the average size being 333 acres (135 ha), and the average dollar value per acre being US $6,708. In the same year, there were 13.7 million harvested acres of corn for grain, producing 2.36 billion bushels, which yielded 172.0 bu / acre, with US $14.5 billion of corn value of production. Almost 1.88 billion bushels of corn were grown in the state in 2012 on 13.7 million acres of land, while the 2013 projections are 2.45 billion bushels of corn on 13.97 million acres of land.

paragraph_text: Until the 1930s, the United States produced most of the world's maple syrup. Today, after rapid growth in the 1990s, Canada produces more than 80 percent of the world's maple syrup, producing about 73,000,000 litres (19,000,000 US gal) in 2016. The vast majority of this comes from the province of Quebec, which is the world's largest producer, with about 70 percent of global production.

paragraph_text: The Prince of Wales is a cocktail created by Albert Edward, Prince of Wales, who later becomes King Edward VII. There are several variations of the cocktail, but what they usually have in common is champagne, angostura bitters, sugar (or simple syrup), either rye whiskey or cognac, and a liqueur.

paragraph_text: Shamishi are semolina fried pies that have been produced in Cyprus since at least the 19th century and they are considered a traditional delicacy of the cuisine of Cyprus. Shamishi are known as a dessert that is served hot in special occasions such as weddings and local religious feasts usually along with loukoumades and water and it is a variety of fried pastry filled with halva and semolina. In addition to halva and semolina, shamishi includes ingredients like flour, water, sugar, mastic, oil (corn or groundnut oil), salt, among others.

paragraph_text: The Corning Museum of Glass is a museum in Corning, New York dedicated to the art, history and science of glass. It was founded in 1951 by Corning Glass Works and currently has a collection of more than 50,000 glass objects, some over 3,500 years old.

paragraph_text: High - fructose corn syrup (HFCS) (also called glucose - fructose, isoglucose and glucose - fructose syrup) is a sweetener made from corn starch that has been processed by glucose isomerase to convert some of its glucose into fructose. HFCS was first marketed in the early 1970s by the Clinton Corn Processing Company, together with the Japanese Agency of Industrial Science and Technology where the enzyme was discovered in 1965.

paragraph_text: Valtra is a manufacturer of tractors and agricultural machinery and forms part of the AGCO Corporation. Valtra tractors are manufactured in Suolahti, Finland, and Mogi das Cruzes, Brazil. Valtra’s products in the Brazilian market also include combine harvesters, sugar cane harvesters, self-propelled sprayers and seed drills.

paragraph_text: During the summer growing season, phosphate is at a high level. It has a vital role in the breakdown of the sugars manufactured by chlorophyll. But in the fall, phosphate, along with the other chemicals and nutrients, moves out of the leaf into the stem of the plant. When this happens, the sugar-breakdown process changes, leading to the production of anthocyanin pigments. The brighter the light during this period, the greater the production of anthocyanins and the more brilliant the resulting color display. When the days of autumn are bright and cool, and the nights are chilly but not freezing, the brightest colorations usually develop.

paragraph_text: The Pepsi - Cola Made with Real Sugar, formerly called Throwback, is a brand of soft drink sold by PepsiCo in the United States and in sweet stores in South Australia for its flagship Pepsi and Mountain Dew brands. The drinks, called Pepsi Throwback and Mountain Dew Throwback, are named as such because they are flavored with cane sugar and beet sugar instead of high fructose corn syrup, which soft drink companies used to replace sugar (in their North American products) in the 1980s. In addition, these drinks use retro packaging. As of June 2014, Pepsi Throwback has been replaced in one area of the United States by ``Pepsi - Cola Made with Real Sugar '', a new product formulation, also made without high fructose corn syrup.

paragraph_text: Tava was a carbonated beverage fortified with vitamins and minerals, released by PepsiCo in the first half of 2008. It was marketed exclusively on the web.

paragraph_text: Maple liqueur refers to various alcoholic products made from maple syrup, primarily in the Northeast United States and Canada. It is most commonly made by mixing Canadian rye whiskey and Canadian maple syrup. Maple liqueur is considered an important cultural beverage in certain Canadian festivals.

paragraph_text: Kola Shaler is a cola soft drink manufactured in Nicaragua by a company called "Kola Shaler Industrial", founded by David Robleto Aleman. Kola Shaler ingredients are imported from England. It is lower in sugar and carbonation compared to others soft drinks.

paragraph_text: ``Changes ''Single by David Bowie from the album Hunky Dory B - side`` Andy Warhol'' Released 7 January 1972 Format 7 ''single Recorded Trident Studios, London, summer 1971 Genre Art pop, glam rock Length 3: 33 Label RCA Records 2160 Songwriter (s) David Bowie Producer (s) Ken Scott, David Bowie David Bowie singles chronology ``Moonage Daydream'' (1971)`` Changes ''(1972) ``Starman'' (1972)`` Moonage Daydream ''(Arnold Corns) (1971) ``Changes'' (1972)`` Starman ''(1972) Hunky Dory track listing ``Changes'' (1)`` Oh! You Pretty Things ''(2) Alternative cover Music video ``Changes'' (Live) on YouTube

paragraph_text: Cocoa Puffs is a brand of chocolate-flavored puffed grain breakfast cereal, manufactured by General Mills. Introduced in 1958, the cereal consists of small orbs of corn, oats, and rice flavored with cocoa. Essentially, Cocoa Puffs are Kix cereal with chocolate flavoring; similarly, Trix has been, for most of its existence, fruit-flavored Kix.

paragraph_text: Deep Eddy Vodka Distillery is a distillery in Dripping Springs, Texas that manufactures vodka products made of south Texas corn using continuous distillation in a column still. Dripping Springs is not a part of Austin, Texas, but is, in fact, a separate town.

paragraph_text: Birinci Udullu (also, Tava, Udula, Uduli, Uduli Pervyye, Udullu Pervoye, Udulu, and Uduly) is a village and municipality in the Hajigabul District of Azerbaijan. It has a population of 1,837.

paragraph_text: Shark Energy Drink is available in a number of variations, including carbonated, uncarbonated versions, sugared and sugar-free. The drink is manufactured in Thailand by the Osotspa Co. Ltd in Bangkok, and also in Europe by Shark AG in Innsbruck, Austria.

paragraph_text: The Corn Belt is a region of the Midwestern United States that, since the 1850s, has dominated corn production in the United States. More generally, the concept of the ``Corn Belt ''connotes the area of the Midwest dominated by farming. Many towns in this area are connected to powerful farm organizations with lobbying power.

Question: When did the manufacturer of Tava change from sugar to corn syrup?
Answer: the 1980s