Nice polls, DMP! I went ahead and answered based on the highest level attained for each class in our game. After 2 TPKs and some player churn, the longest-surviving characters are now 5th level. We have never had anyone higher. They are joined by a bunch of aspirational first-level characters at this point, having lost 2nd- and 3rd-level people to Port Greeley. It's taken just over a year for those two characters to reach 5th level. Many, many 1st-lvl. characters have died in the interim. So my numbers are going to skew your results really low.
Maybe this thread can be used in case anyone else wants to contextualize the raw numbers.