"Forbes" ranked Sam Walton as the richest person in the United States from 1982–88, ceding the top spot to John Kluge in 1989 when the editors began to credit Walton's fortune jointly to him and his four children. (Bill Gates first headed the list in 1992, the year Walton died.) Wal-Mart Stores, Inc. also runs Sam's Club warehouse stores. Walmart operates in the United States and in more than fifteen international markets, including: Argentina, Brazil, Canada, Chile, China, Costa Rica, El Salvador, Guatemala, India, South Africa, Botswana, Ghana, Malawi, Mozambique, Namibia, Tanzania, Uganda, Zambia, Kenya, Lesotho, Swaziland, Honduras,