Have any numbers to back that up? I didn't think so.
Results.— From 1964 to 1995, a total of 495 hot-air balloon crashes involving 1533 persons were reported and included 92 fatalities and 384 serious injuries. Pilot error or incapacitation was determined subjectively by crash investigators to contribute to 85.1% of the crashes. In univariate analysis, collision with the ground was the most significant predictor of a fatality or serious injury, and power-line contact was the most significant predictor of fatality. In multiple logistic regression, only the type of object struck by a balloon predicted a fatal crash or a fatality or serious injury.
Conclusions.— Although a number of factors likely contribute to increased severity of hot-air balloon crashes, the object struck during a crash is most predictive of fatality or serious injury. Preventive efforts are needed to decrease future injuries.
http://jama.ama-assn.org/cgi/content/full/279/13/1011
It would be a waste of time checking vehicle deaths, you know what the results would be.