CREATE TABLE table_204_912 (id NUMBER, "rank" NUMBER, "athlete" CLOB, "country" CLOB, "time" NUMBER, "notes" CLOB)

how many athletes ranked in the top 15 are from the united states ?
SELECT COUNT("athlete") FROM table_204_912 WHERE id <= 15 AND "country" = 'united states'
SELECT COUNT("athlete") FROM "table_204_912" WHERE "country" = 'united states' AND "id" <= 15