I check the power graph and there was only a line for me. I've met all the other Civs by now. Actually I'm kind of in the late game. Is this because I have espionage turned off? I couldn't find a way to get the other Civs to show.
Heres a save:
182167

If you turned off the espionnage function, you won't be able to see the graphs. Install Solver's unofficial patch to solve this (or, if you want, only the file related to the espionnage screen). It can be found in the BTS forum.

Thank you Juju.