CREATE TABLE table_203_340 (id NUMBER, "rank" NUMBER, "airport" CLOB, "passengers handled" NUMBER, "% change 2011 / 12" NUMBER)

looking at the top 10 busiest routes to and from london southend airport what is the average number of passengers handled ?
SELECT AVG("passengers handled") FROM table_203_340
SELECT AVG("passengers handled") FROM "table_203_340"