Only us (former) marathoners, probably. We know, appreciate and respect the work required to prepare for it, and the perseverance to finish, especially to finish well.
That's the thing right there - if you were a very active runner, or still are one, you tend to remember your times, especially the good ones. For examply, I ran a 5K yesterday in 25:53, 44 seconds faster than my previous 5K. I'll remember it for a while, but I keep track of these things. It's a hobby that interests me.
Had I run a one-off Marathon 20+ years ago and pretty-much avoided competitive running since, I would probably not answer correctly if someone asked me about my time.
Frankly, this is all irrelevent - it's the economy that matters. In fact, when the libs ask about this issue, just tell them "It's the economy, stupid".