I don't track player kills, tpk's or perma-deaths. if i had to guess... 7 or 8 tpk's and 6 perma-death?
My most memorable TPKs came in back to back years at JimCon in Canada...
Running Siege of the Diamond City at 12-13... power word stun is no joke.
The next year running a 4 player team through Tomb of the Iron Medusa... phew that can be a tough module.
But in both cases... a PC killed the rest for me. So I can't take all the credit. Both times the players grinned at their hidden note instructions.
now that i think about it... having a player voluntarily retire for roleplay reasons was glorious.