CREATE TABLE table_204_374 (id DECIMAL, "event" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL, "ranking" TEXT)

which year was their highest ranking ?
SELECT "event" FROM table_204_374 ORDER BY "ranking" LIMIT 1
SELECT "event" FROM "table_204_374" ORDER BY "ranking" NULLS FIRST LIMIT 1