Cohort progression — Ullensakersvømmerne
Median season-best times of each birth-year cohort, overlaid by age — shows how consecutive groups developed at the same stage of training.
Event: 50 freestyle100 freestyle50 butterfly50 breaststroke200 freestyle50 backstroke100 breaststroke200 medley100 backstroke400 freestyle200 backstroke100 butterfly400 medley200 breaststroke