Judging by the photos it's definitely in the 2 digits, although given the existence of a number 70 let's assume it's ~99: https://www.worldconkerchampionships.com/gallery/all/Geoff%2...

I guess it could be that each country can only send at most one representative (making her the US Conker Champion) but I'm going to go out on a limb and say that's a little unlikely.