just wondering

I know its something like 3% of the population have run a marathon but does anyone know;

the actual percentage of the population who have run a marathon
the percentage who have run a GFA/championship time
the actual percentage who have run a 10K

The reason is while R4L has substantially increased the number of people doing 5K - I'm not so sure of the 10K figures.

having just done a very bad race, would like to reassure myself that most people never get there.

well on a totally statistically invalid sample of "my living, adult family members": 

done a 10k:  me and a cousin = 2
not done a 10k: the other 9 people

Lots and lots of people never get there.  Lots and lots never even try.

You did well to get out there and try.  So it was a bad day.  there'll always be those days.  Have a think about what went wrong (too fast start?  drink enough?  hotter than normal?  getting a cold?  just a bad day?).

Then...have a chilled week, don't beat yourself up and by next weekend enter yourself for another 10k so you've something to focus on to get you out of the doldrums. 

Take care, HH