Passenger car occupants
Large truck occupants
Air carriers (actual and smoothed fatality rates)1
Light truck occupants
1For air carriers, the data were dampened, or smoothed, to reduce the month-to-month fluctuations. This dampening was performed using an exponential smoothing model, with a weight of 0.95. Departure data, and hence the denominator of the rates, are not strictly comparable between pre - and post - 1977 eras.
SOURCE: Various sources, as cited in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics 2000 (Washington, DC: 2001)