Cohort progression — Sundráð Íþróttabandalags Reykjavíkur
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 backstroke100 backstroke200 freestyle50 butterfly100 butterfly100 breaststroke50 breaststroke200 medley200 breaststroke200 backstroke400 freestyle100 medley200 butterfly800 freestyle