CREATE TABLE table_39544 ("Rank" FLOAT, "Place" TEXT, "County" TEXT, "Per Capita Income" TEXT, "Median House- hold Income" TEXT, "Median Family Income" TEXT, "Population" FLOAT, "Number of Households" FLOAT)

What is the Number of Households that have a Per Capita Income of $21,345?
SELECT AVG("Number of Households") FROM table_39544 WHERE "Per Capita Income" = '$21,345'
SELECT AVG("Number of Households") FROM "table_39544" WHERE "Per Capita Income" = '$21,345'