When I enter in https://stackoverflow.com/reputation I get:
total votes: 13612 ../.. ** total rep 77748 :)
When I do the same in https://askubuntu.com/reputation I get:
total votes: 146 ../.. ** total rep 715 :)
A reputation of 77K comes from 7.8K votes, the most (because reputation comes quite often from accepted answers). Similarly, 715 rep is around 70 votes.
So I wonder: what does this "total votes" refer to? Adding the votes that I casted to the sum does not become this number, neither.