CREATE TABLE table_61538 ("Year" FLOAT, "Competition" TEXT, "Venue" TEXT, "Position" TEXT, "Notes" TEXT)

What is the average year with 7th (heats) position?
SELECT AVG("Year") FROM table_61538 WHERE "Position" = '7th (heats)'
SELECT AVG("Year") FROM "table_61538" WHERE "Position" = '7th (heats)'