if so get rid of the last 3/4 options and include stuff like AAC and AAAA and AAAB.
Btw are people voting seriously or do so many people here actually get AAA?
It's quite possible that there really are all those AAAs, tbh. TSR is hardly a proportionate slice of the population - it's mostly high achievers who come on these forums (*sweeping generalisation alert* partly because you'll not get many lower achievers who want to spend their free time on forums dedicated to education).
Mind you, I'd have expected a lot more Bs and Cs, really.