KUALA LUMPUR: Malaysia's palm oil sector stands to lose an estimated 11.83 billion ringgit ($2.89 billion) in revenue for each year that pandemic curbs restrict the supply of workers, an industry grouping said on Monday. The world's second largest palm producer relies on foreigners for 70% of its plantation workforce, but the flow of workers from nations such as Indonesia and Bangladesh has dried up since border closures in the middle of March last year. "The labour-intensive plantation sector has been registering a net outflow of foreign workers, especially over the past one year, as and when their employment contracts expire," the grouping of 12 industry bodies said in a joint statement.