What % Change is listed against the airport with a rank less than 8 and a 2003 rank of 6?
CREATE TABLE "2004_final_statistics" (
  "rank" real,
  "airport" text,
  "location" text,
  "code_iata" text,
  "total_cargo_metric_tonnes" text,
  "2003_rank" text,
  "pct_change" text
);
SELECT "pct_change" FROM "2004_final_statistics" WHERE "rank"<8 AND "2003_rank"='6';