CREATE TABLE table_203_396 (id DECIMAL, "year" DECIMAL, "domestic passengers" DECIMAL, "international passengers" DECIMAL, "total passengers" DECIMAL, "change" TEXT)

which year saw the highest drop in total passengers from the previous year ?
SELECT "year" FROM table_203_396 ORDER BY "change" LIMIT 1
SELECT "year" FROM "table_203_396" ORDER BY "change" NULLS FIRST LIMIT 1