Average points per show is total points divided by # of shows.
For example, take Tanya Dziahileva. She scored a total of 124 points, ranking #33 on the previous list. Doutzen Kroes who is #34, also earned 124 points. However, Tanya only did 22 shows, while Doutzen did 29 shows. That means that Doutzen's average points per show is 4.28, while Tanya averages 5.64 points per show.
For Tanya, I multiplied 5.64x124 to get 699.36
For Doutzen, it's 4.28x124=530.72
Therefore, on this final list, Tanya moves up to #25 because she's done higher quality shows, while Doutzen moves down one place to #35.