CREATE TABLE table_203_206 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

which country won the second highest number of silver medals ?
SELECT "nation" FROM table_203_206 WHERE "silver" < (SELECT MAX("silver") FROM table_203_206) ORDER BY "silver" DESC LIMIT 1
SELECT "nation" FROM "table_203_206" WHERE "silver" < (SELECT MAX("silver") FROM "table_203_206") ORDER BY "silver" DESC NULLS LAST LIMIT 1