Frequencies for pdeaths variable in parkwork dataset :

  fatals in |
    vehicle |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,059       97.25       97.25
          1 |         30        2.75      100.00
------------+-----------------------------------
      Total |      1,089      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016