CREATE TABLE table_204_438 (id DECIMAL, "year" DECIMAL, "title" TEXT, "album" TEXT, "us r&b" DECIMAL, "us pop" DECIMAL, "us dance" DECIMAL)

what is the last year listed ?
SELECT "year" FROM table_204_438 ORDER BY id DESC LIMIT 1
SELECT "year" FROM "table_204_438" ORDER BY "id" DESC NULLS LAST LIMIT 1