Question: In what year was the membership-only retail chain founded by Sam Walton founded?

Context articles: Sam's Club
Ann Walton Kroenke
Alice Walton
Más Club
Audrey J. Walton Stadium (Columbia, Missouri)
Chain store
Walmart
Sam Walton
Walton Construction
Roy Vernon Scott

Sam's West, Inc. (doing business as Sam's Club) is an American chain of membership-only retail warehouse clubs owned and operated by Walmart, founded in 1983 and named after Walmart founder Sam Walton.
 s of 2012 , Sam's Club chain serves 47 million U.S. (including Puerto Rico) members and is the 8th largest U.S. retailer.
 s of 31, 2008 , Sam's Club ranks second in sales volume among warehouse clubs with $56.828 billion in sales (in fiscal year 2016) behind Costco.
Ann Walton Kroenke (born December 18, 1948) is an heiress to the Wal-Mart fortune.
 Kroenke and her sister, Nancy Walton Laurie, inherited stock from her father, Bud Walton (died 1995), who was brother and an early business partner of Wal-Mart founder Sam Walton.
Alice Louise Walton (born October 7, 1949) is an American heiress to the fortune of Wal-Mart Stores, Inc. She is the daughter of Wal-Mart founder Sam Walton and Helen Walton, and sister of S. Robson Walton, Jim Walton and the late John T. Walton.
 With a net worth of $40.8 billion she is the wealthiest woman in the world, according to "Forbes", following the death of Liliane Bettencourt in September 2017.
Más Club is a defunct American membership-only retail warehouse club focused on the Hispanic population.
 Founded in 2009, it was owned and operated by Walmart.
 It opened on August 6, 2009, with a single pilot store in Houston, Texas and officially closed its doors on February 7, 2014.
Audrey J. Walton Stadium on the campus of the University of Missouri is the home of the Missouri Tigers track and field teams and the Missouri Relays track and field meet.
 Audrey J. Walton, the namesake of the Stadium, was married to Sam Walton's brother, Bud Walton.
 Sam Walton is the founder of Wal-Mart and an alumnus of the University.
 The stadium has a seating capacity of 2,500 and is also the home of the men's and women's soccer teams at the University of Missouri.
Chain store(s) or retail chain are retail outlets that share a brand and central management, and usually have standardized business methods and practices.
 In retail, dining, and many service categories, chain businesses have come to dominate the market in many parts of the world.
 A franchise retail establishment is one form of chain store.
 In 2004, the world's largest retail chain, Wal-Mart, became the world's largest corporation based on gross sales.
Wal-Mart Stores, Inc. ( ), doing business as Walmart, is an American multinational retailing corporation that operates as a chain of hypermarkets, discount department stores, and grocery stores. Headquartered in Bentonville, Arkansas, the company was founded by Sam Walton in 1962 and incorporated on October 31, 1969.
 s of 31, 2017 , Walmart has 11,695 stores and clubs in 28countries, under a total of 63banners.
 The company operates under the name Walmart in the United States and Canada.
 It operates as Walmart de México y Centroamérica in Mexico and Central America, as Asda in the United Kingdom, as the Seiyu Group in Japan, and as Best Price in India.
 It has wholly owned operations in Argentina, Chile, Brazil, and Canada.
 It also owns and operates the Sam's Club retail warehouses.
Samuel Moore Walton (March 29, 1918 – April 5, 1992) was an American businessman and entrepreneur best known for founding the retailers Walmart and Sam's Club.
In 1985, Greg Walton founded Walton Construction, a privately owned construction company, in Kansas City, Missouri.
 In two decades, Walton has become one of the top 100 general contractors in the United States, according to Engineering News Record, with annual revenue exceeding $800 million.
 Among the major projects Walton Construction has worked on are the Legends at Village West in Wyandotte County, Kansas, and the Zona Rosa mixed use development, along with many others.
 Along with having its headquarters in Kansas City, Walton Construction has divisions in:
Roy Vernon Scott (born December 26, 1927) is a Professor Emeritus of history at Mississippi State University in Starkville, Mississippi, who specialized in agricultural and railroad studies in the American South and Midwest.
 In 1997, he co-authored "Wal-Mart: A History of Sam Walton's Retail Phenomenon", a study of Sam Walton's Wal-Mart retail giant.