(You can click on the graph to make it bigger)
There was a question over on the TGO Challenge Message Board about the drop off rate of first timers on the TGO Challenge. I had often wondered about that myself - so I set to, to find out.
The above graph shows the entrants to this year's Challenge that were accepted at the first pass in November. It shows those attempting their first Challenge (108) and right over at the right hand end of the graph, Bill Robertson, amazingly, attempting his 29th crossing!
Make of it what you will!