So there's always a big upswing for the light nights / warmer weather, and then it tails off again in the winter?
I wondered whether the Olympics had an effect, or whether people thought it was cheaper than the gym!
Separate topic really, but I'm always surprised other runners don't greet each other or smile when I go past the other way. If you're out hiking in the hills, everyone says hello- on the city pavements, not even a friendly nod.