CREATE TABLE table_204_609 (id DECIMAL, "year" DECIMAL, "car" DECIMAL, "start" DECIMAL, "qual" DECIMAL, "rank" DECIMAL, "finish" DECIMAL, "laps" DECIMAL, "led" DECIMAL, "retired" TEXT)

what was the last year that it finished the race ?
SELECT "year" FROM table_204_609 ORDER BY "year" DESC LIMIT 1
SELECT "year" FROM "table_204_609" ORDER BY "year" DESC NULLS LAST LIMIT 1