Frequencies for veh_no variable in parkwork dataset :

    vehicle |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         41        3.62        3.62
          2 |        610       53.84       57.46
          3 |        290       25.60       83.05
          4 |         96        8.47       91.53
          5 |         37        3.27       94.79
          6 |         27        2.38       97.18
          7 |         13        1.15       98.32
          8 |          9        0.79       99.12
          9 |          3        0.26       99.38
         10 |          3        0.26       99.65
         11 |          3        0.26       99.91
         12 |          1        0.09      100.00
------------+-----------------------------------
      Total |      1,133      100.00

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