The east African nation is a fairly small producer by global standards, but its quality beans are used by roasters to blend with beans from other regions.
Grade AA coffee sold at $195-$329 per bag, compared with $180-$376 at last week's auction, the exchange said in a market report.
Grade AB coffee fetched $208-$260 per bag compared with $146-$279 last week.
The average price of all grades was $230.18, compared with $247.19 at the last sale.