This argument is very similar to the argument, "How many people have died in Iraq because of the invasion?"
see
http://en.wikipedia.org/wiki/Lancet_surveys_of_Iraq_War_casualties
There are various methodologies, some will give more accurate results than others, but I would like to point out:
"The Lancet surveys are controversial because their mortality figures are higher than most other reports, including those of the Iraqi Health Ministry and the United Nations, as well as other household surveys such as the Iraq Living Conditions Survey and the Iraq Family Health Survey."4
and,
"The Lancet surveys have triggered criticism and disbelief from some journalists, governments, theIraq Body Count project, some epidemiologists and statisticians and others, but have also been supported by some journalists, governments, epidemiologists and statisticians. [7]"
So if someone were to make a Wikipedia article on ex-JW's and their calculations of how many deaths have occurred because of the blood doctrine, it would probably look something like this.
Has someone else tried ANOTHER methodology? Another set of data? Scouring through medical databases of various countries at various points in time, and comparing to JW data? Extrapolation is very risky, especially if done with a very limited set of data.
AFAIK, there are very few situations where one can be very, highly confident that the rejection of blood WAS the ultimate cause of death. For example, AFAIK, cancer killing your body's RBC production, making you have severe anemia that cannot be treated with the blood alternatives. Chances of dying go from "extremely high" because of rejecting the blood transfusions, to "low" because of accepting the treatment. It can still be argued that the cancer killed the patient, but I have seen studies that show that the cause of death is more atributable to the rejection of the blood transfusion, since the patients that accepted the blood could eventually produce RBC's on their own, and were cancer-free, whereas the ones who rejected the blood could have been cancer-free, but their anemia killed them.
(please correct me if wrong in the above paragraph)...
just my 2 cents...
ILTTATT