How many times did Sham Kwok Fai score in the game that was played on 22 February 2006?
CREATE TABLE "international_career" (
  "date" text,
  "venue" text,
  "result" text,
  "scored" real,
  "competition" text
);
SELECT SUM("scored") FROM "international_career" WHERE "date"='22 february 2006';