CREATE TABLE table_204_75 (id DECIMAL, "year" DECIMAL, "place" TEXT, "gold" TEXT, "silver" TEXT, "bronze" TEXT)

which country has won more gold medals : china or mexico ?
SELECT "gold" FROM table_204_75 WHERE "gold" IN ('chn', 'mex') GROUP BY "gold" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "gold" FROM "table_204_75" WHERE "gold" IN ('chn', 'mex') GROUP BY "gold" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1