How what proportion of the entire global population of functional programmers who qualify as proficient or better on this scale are employed by Standard Chartered?

(This is intended as a serious question, not a troll. It often seems that in discussions of FP, and particularly of Haskell, someone will suggest that there are few widely-known, large-scale projects written in this style that can be used to evaluate its effectiveness, and someone else will then reply with one or more of the same very small collection of larger projects or high profile organisations using FP/Haskell that are publicly known.)