Frequencies for pdeaths variable in parkwork dataset :

  Fatals in |
    Vehicle |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        978       97.60       97.60
          1 |         21        2.10       99.70
          2 |          2        0.20       99.90
          4 |          1        0.10      100.00
------------+-----------------------------------
      Total |      1,002      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016