Expecting different sources than the CIA, I turned to the appendix of, "The Cuba Reader, " edited by a team from the long time leftist think tank, the IPS, published by Grove Press. (Their readers on El Salvador and Nicaragua were classics, the former for example reprinted the great piece from New Left Review by Harald Jung on the origins of the FDR-FMLN). Nope, the same GDP and GSP stats, though from the mid-80's. Impressive health and education indicators, though a brief look at one of the books by a contributor, Edward Gonzalez, "Castro: the Limits of Charisma, " had assertions that vast deficits in infrastructure were building from the late 70's on.
One particular author I did not expect in the Reader was Wassily Leontief. He is represented by a piece from the NYRB on the failed ten million ton sugar harvest of 1970. One stat in the book, "Cuba: Radical face of Stalinism, " pg. 44, says that in sept. and Oct. 1970 ther was a staggering rate of absenteeism on any one day of 20% or 400,000 workers for the sugar harvest. In Oriente province it was 52%.
An excellent annotated bibliography, over a 100 pgs. on all aspects of Cuban history is in, "Cuba: Between reform and revolution, " by Louis A Perez, Jr, Oxford U. Press, 2nd ed. 1995. Perez, if memory serves has written in the past for the marxist journal, Science & Society. Michael Pugliese