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FILE - In this Wednesday, Nov. 11, 2015, file photo, a customer enjoys lunch at a Chipotle restaurant in Portland, Ore. Chipotle reports financial results Tuesday, Oct. 25, 2016. (AP Photo/Don Ryan, File)

The burrito chain said Tuesday that sales fell 21.9 percent at established restaurants during the third quarter, worse than the 18.3 percent drop Wall Street analysts expected, according to FactSet. It’s the fourth straight quarter of sales declines for the company after an E. coli outbreak last year sickened some customers.