Frequencies for ptowed variable in parkwork dataset :

    vehicle |
    removal |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |        315       27.49       27.49
          3 |        155       13.53       41.01
          5 |        605       52.79       93.80
          8 |         53        4.62       98.43
          9 |         18        1.57      100.00
------------+-----------------------------------
      Total |      1,146      100.00

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