What is the smallest number of tries when Matt Diskin is the player and there are more than 16 points?
CREATE TABLE "2008_squad" (
  "squad_no" real,
  "player" text,
  "position" text,
  "tries" real,
  "goals" real,
  "points" real
);
SELECT MIN("tries") FROM "2008_squad" WHERE "player"='matt diskin' AND "points">16;