CREATE TABLE table_52610 ("Year" FLOAT, "Theme" TEXT, "Artist" TEXT, "Mintage" FLOAT, "Issue Price" FLOAT, "Special Notes" TEXT)

What was the average year for a coin that had a mintage smaller than 10,000?
SELECT AVG("Year") FROM table_52610 WHERE "Mintage" < '10,000'
SELECT AVG("Year") FROM "table_52610" WHERE "Mintage" < '10,000'