CREATE TABLE table_48168 ("Rank" TEXT, "Administrative Division" TEXT, "Area  ( km\\u00b2 ) " FLOAT, "Area  ( sq mi ) " FLOAT, "National Share  ( % ) " FLOAT, "Comparable Country" TEXT)

What is the average area in square miles for the hunan administrative division with a national share less than 2.19%?
SELECT AVG("Area (sq mi)") FROM table_48168 WHERE "Administrative Division" = 'hunan' AND "National Share (%)" < '2.19'
SELECT AVG("Area (sq mi)") FROM "table_48168" WHERE "Administrative Division" = 'hunan' AND "National Share (%)" < '2.19'