The table on 133 works well with the Random Experience Table (if you don't have the predesignated skill level for a Force).
For example, reading the row from the left for a Force with a Regular experience level, you'd have 0WB;10%Really Green;20Green;30 Reg;20 Vet;10 Elite; 5 Heroic; 5 Legendary. There are options to remove the lowest and highest and keep it between the normal experience levels of Green, Regular, Vet and Elite. You should get the book. It's still pretty massive at 354 pages and has a lot of information for force building. To get a more realistic version of skills follow the example given found just below the table.
Taking a quick scan of CO, I can see there's a table for Force Experience Rating but no breakdown that i could see that IO:BF gives.