And you shouldn't be able to find it unless he tells you. Hundreds of conditions are ratable. Unlike a normal system, you start with 100% and your highest rating comes off (say a 40%). But you have 3 40% ratables, next one worth 40% of 60 and the last 40% of 36 for a total disability rating of 80%.
Many thanks for the clarification & additional info. Was not aware of exactly how that process worked.