Frequencies for ptowed variable in parkwork dataset :

    Vehicle |
    Removal |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        197       19.66       19.66
          2 |        281       28.04       47.70
          3 |        108       10.78       58.48
          4 |        302       30.14       88.62
          8 |         53        5.29       93.91
          9 |         61        6.09      100.00
------------+-----------------------------------
      Total |      1,002      100.00

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