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)

which year is the last qual on the chart
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