Question: In 2005, which series codes use the International Monetary Fund, Balance of Payments Statistics Yearbook and data files source?
SQL: SELECT T1.Seriescode, T2.Source FROM Footnotes AS T1 INNER JOIN Series AS T2 ON T1.Seriescode = T2.SeriesCode WHERE T1.Year LIKE '%2005%' AND T2.Source LIKE 'International Monetary Fund%'