Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_48168 ( "Rank" text, "Administrative Division" text, "Area (km\u00b2)" real, "Area (sq mi)" real, "National Share (%)" real, "Comparable Country" text )

### Question ###
What is the average area in square miles for the hunan administrative division with a national share less than 2.19%?

### Accurate SQL ###

SELECT AVG("Area (sq mi)") FROM table_48168 WHERE "Administrative Division" = 'hunan' AND "National Share (%)" < '2.19'