user: Question: What is the highest extra total before 2003 at the Meeting of all africa games?
Columns: ['Year', 'Meeting', 'Venue', 'Result', 'Event', 'Extra']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1998.0, 'Championnats Nationaux', 'Reduit, Mauritius', '1st', 'Long Jump', 7.53]
SQL:

assistant: SELECT MAX("Extra") FROM "Table" WHERE "Meeting" = 'all africa games' AND "Year" < 2003.0;