It has become increasingly difficult to assess the performance of the Cuban economy in recent years, because of the non-appearance of some important economic data. At the end of October, the Anuario Estadístico de Cuba, which is usually published by July by the Oficina Nacional de Estadísticas e Información (ONEI, the national statistics office), was missing three chapters: chapter 5, which covers national income accounts; chapter 6, public finances; and chapter 8, the external sector. The biggest gap in the data is in the external accounts. Not only is the relevant chapter missing from the 2011 Anuario, but there were…