What is the rank of the airport with the BKK/VTBS code?
CREATE TABLE "2007_final_statistics" (
  "rank" real,
  "airport" text,
  "code_iata_icao" text,
  "total_cargo_metric_tonnes" real,
  "pct_change" text
);
SELECT "rank" FROM "2007_final_statistics" WHERE "code_iata_icao"='bkk/vtbs';