What is the power stage wins total number if the wins is 10?
CREATE TABLE "constructors" (
  "pos" real,
  "constructor" text,
  "chassis" text,
  "starts" real,
  "finishes" real,
  "wins" real,
  "podiums" real,
  "stage_wins" real,
  "power_stage_wins" real,
  "points" real
);
SELECT COUNT("power_stage_wins") FROM "constructors" WHERE "wins"=10;