With RDG averages calculated and substituted.

Albacore-FS   17 races, best 9,
8 of 21 sailors sailed/RC’d more than half the Albacore races

I20-FS  7 races, best 4
2 of 9 sailors sailed/RC’d more than half the I20 races

Lightning-FS 8 races, best 4
4 of 11 sailors sailed/RC’d more than half the Lightning races.

Scoring rules are here.   See paragraphs 4.2, 7.6, and 9.2.