======================================================================== A. SWIMMER 1 ENTRANTS WITH PRESCHOOL HISTORY, BY ENTRY YEAR ======================================================================== Entry year Swimmer 1 entrants with preschool history share 2023 2,891 223 8% 2024 2,192 600 27% 2025 1,877 706 38% Entrants = children whose earliest school-age registration was Swimmer 1 and started in that year. 2022-23 shares are understated: most 2022 preschool rows are missing. ======================================================================== B. WHERE CHILDREN WHO CAME UP FROM PRESCHOOL ENTERED THE SCHOOL-AGE TRACK ======================================================================== Topped out at entered at Swimmer 1 share at Swimmer 2 share Swimmer 3+ Preschool 1 488 435 89% 45 9% 8 Preschool 2 446 393 88% 42 9% 11 Preschool 3 496 415 84% 62 12% 19 Preschool 4 276 211 76% 43 16% 22 Preschool 5 172 74 43% 87 51% 11 Children with at least one preschool registration before their first Swimmer registration. ======================================================================== C. DO CHILDREN WHO TOP OUT AT EACH PRESCHOOL LEVEL REAPPEAR AT SCHOOL AGE? ======================================================================== Topped out at children reappeared share (last preschool start <= 2024) Preschool 1 3,347 488 15% 437 of 1,918 23% Preschool 2 1,942 446 23% 364 of 963 38% Preschool 3 1,558 496 32% 399 of 751 53% Preschool 4 694 276 40% 206 of 350 59% Preschool 5 334 172 51% 131 of 189 69% 'Reappeared' = has any Swimmer registration after their preschool registrations. The right-hand columns drop children whose preschool history ran into 2025, who have had less than a year to come back; those are the fairer reappearance rates. ======================================================================== D. PRESCHOOL 5 FINISHERS PER YEAR (the only rung that changes placement) ======================================================================== 2023: 59 distinct children registered (enrolled or waitlisted) in Preschool 5 2024: 197 distinct children registered (enrolled or waitlisted) in Preschool 5 2025: 148 distinct children registered (enrolled or waitlisted) in Preschool 5