20% result in amputation?

Dr Wandel, who has treated hundreds of wounded American soldiers, said the amputation rate in the Iraq conflict is just 20 per cent compared to 76 per cent during the Vietnam War, translating into thousands of saved limbs. -from this article

According to the Pentagon, 20,687 in the US military have been wounded in Iraq as of October 6, with 9352 injured too seriously to quickly return to duty.