The averages shown look a bit low to me but I can see there are some weird data points (for example the 36k low end comp which is obviously wrong).
My first Wall St job (NYC) in Institutional Equity Sales had a starting base salary of $40k.
front office positions receive much higher year end bonuses - even in bad years like the last three.
I made my money on commissions - there were no bonuses. Need I say what happens in bad years?