Indonesia's refined tin exports were estimated at 7,755.30 tonnes in September, down 29.5 percent from 11,000.56 tonnes in the same month a year ago, trade ministry data showed on Tuesday. About 89 percent of the tin was shipped to Singapore in September, while the remainder was exported to China, Malaysia, Pakistan, Taiwan and Netherlands. Refined tin exports in January to September stood at 75,552.84 tonnes, compared with 75,535.05 tonnes in the same period last year.