CREATE TABLE table_201_10 (id DECIMAL, "#" DECIMAL, "name" TEXT, "office" TEXT, "political party" TEXT, "occupation" TEXT)

after what year were austevoll mayors affiliated with political parties ?
SELECT "office" FROM table_201_10 WHERE "political party" IS NULL ORDER BY "office" DESC LIMIT 1
SELECT "office" FROM "table_201_10" WHERE "political party" IS NULL ORDER BY "office" DESC NULLS LAST LIMIT 1