I was just looking at the end game graphs, and noticed that they aren't designed as well as they could be in some regards. Instead of being a plot of a given level at a given time, they plot changes instead. This isn't really a big deal, unless you have something completely stable (# of planets under enemy control) that then changes radically, and quickly.
E. G. the enemy has 3 planets for most of the game, as I consolidate and expand. Then, I get around to crushing him, hard. The result is that instead of having a flat line then a rapid dip, he has a steadily decreasing line to the point of change -- which totally mis-represents the situation.
Am I making any sense?