Database: authors
Question: Calculate the total average number of papers published from 2002 to 2010 under the conference "Information and Knowledge Engineering".
SQL: SELECT CAST(COUNT(T1.Id) AS REAL) / COUNT(DISTINCT T1.Year) FROM Paper AS T1 INNER JOIN Conference AS T2 ON T1.ConferenceId = T2.Id WHERE T2.FullName = 'Information and Knowledge Engineering' AND T1.Year >= 2002 AND T1.Year <= 2010