In his 1990 book Attrition: Forecasting Battle Casualties and Equipment Losses in Modern War, Trevor Dupuy took a look at the relationship between tank losses and crew casualties in the U.S. 1st Army between June 1944 and May 1945 (pp. 80-81). The data sampled included 797 medium (averaging 5 crewmen) and 101 light (averaging 4 crewmen) tanks. For each tank loss, an average of one crewman was killed or wounded. Interestingly, although gunfire accounted for the most tank and crew casualties, infantry anti-tank rockets (such as the Panzerfaust) inflicted 13% of the tank losses, but caused 21% of the crew losses.
Casualties were evenly distributed among the crew positions.
Whether or not a destroyed tank caught fire made a big difference for the crew. Only 40% of the tanks in the sample burned, but casualties were distributed evenly between the tanks that burned and those that did not. This was due to the higher casualty rate in the tanks that caught fire (1.28 crew casualties per tank) and those that did not (0.78 casualties per tank).
Dupuy found the relationship between tank losses and casualties to be straightforward and obvious. This relationship would not be so simple when viewed at the battalion level. More on that in a future post [Tank Loss Rates in Combat: Then and Now].