Cohort progression — Spårvägen Simförening
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 unknown100 freestyle50 freestyle200 freestyle100 backstroke200 medley100 breaststroke100 unknown50 breaststroke50 backstroke100 butterfly50 butterfly400 freestyle200 backstroke200 breaststroke100 medley200 butterfly800 freestyle200 unknown400 medley
Cohorts to compare: 2017 42016 152015 242014 362013 312012 252011 342010 242009 212008 82007 92006 92005 112004 52003 82002 72001 32000 3