CREATE TABLE table_62559 ("Year" FLOAT, "Total passengers" TEXT, "Passenger Change" TEXT, "Domestic" TEXT, "International  ( total ) " TEXT, "International  ( non-CIS ) " TEXT, "Aircraft Landings" TEXT, "Cargo  ( tonnes ) " TEXT)

What year had cargo tonnes of 13 585?
SELECT AVG("Year") FROM table_62559 WHERE "Cargo (tonnes)" = '13 585'
SELECT AVG("Year") FROM "table_62559" WHERE "Cargo (tonnes)" = '13 585'