CREATE TABLE table_203_211 (id DECIMAL, "pos." DECIMAL, "time" TEXT, "athlete" TEXT, "country" TEXT, "venue" TEXT, "date" TEXT)

which country had the most athletic representation ?
SELECT "country" FROM table_203_211 GROUP BY "country" ORDER BY COUNT("athlete") DESC LIMIT 1
SELECT "country" FROM "table_203_211" GROUP BY "country" ORDER BY COUNT("athlete") DESC NULLS LAST LIMIT 1