Frequencies for veh_no variable in parkwork dataset :

    vehicle |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         47        4.10        4.10
          2 |        610       53.23       57.33
          3 |        282       24.61       81.94
          4 |        108        9.42       91.36
          5 |         48        4.19       95.55
          6 |         22        1.92       97.47
          7 |         12        1.05       98.52
          8 |          7        0.61       99.13
          9 |          5        0.44       99.56
         10 |          2        0.17       99.74
         11 |          2        0.17       99.91
         12 |          1        0.09      100.00
------------+-----------------------------------
      Total |      1,146      100.00

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