Frequencies for pdeaths variable in parkwork dataset :

  fatals in |
    vehicle |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,052       96.43       96.43
          1 |         34        3.12       99.54
          2 |          4        0.37       99.91
          3 |          1        0.09      100.00
------------+-----------------------------------
      Total |      1,091      100.00

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