CREATE TABLE table_203_515 (id NUMBER, "rank" NUMBER, "city" CLOB, "passengers" NUMBER, "ranking" NUMBER, "airline" CLOB)

what is the average number of passengers in the united states ?
SELECT AVG("passengers") FROM table_203_515 WHERE "city" = 'united states'
SELECT AVG("passengers") FROM "table_203_515" WHERE "city" = 'united states'