We now have the ABBI sires page updating itself continually.
The data there is based on the bulls in Probullstats that we have linked up to their ABBI number. As of right now, that's about 2390 animals.
The percentages listed there are based on the number of animals each sire has in the registry that are 3+ years old (old enough to buck with a rider). Note that many sires on this list that have high percentages have them because they are used within a single herd belonging to a contractor who has the means to haul them somewhere.
Next step will be to reference the number of outs for sons of each sire, and the average markings.
ABBI Sires