CREATE TABLE table_13977 ("Country" CLOB, "Airport" CLOB, "City" CLOB, "2008" FLOAT, "Change  ( 08/07 ) " CLOB)

Which 2008 has an Airport of julius nyerere international airport?
SELECT AVG("2008") FROM table_13977 WHERE "Airport" = 'julius nyerere international airport'
SELECT AVG("2008") FROM "table_13977" WHERE "Airport" = 'julius nyerere international airport'