Frequencies for veh_no variable in parkwork dataset :

    vehicle |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         54        4.98        4.98
          2 |        577       53.23       58.21
          3 |        268       24.72       82.93
          4 |        102        9.41       92.34
          5 |         41        3.78       96.13
          6 |         17        1.57       97.69
          7 |         11        1.01       98.71
          8 |          4        0.37       99.08
          9 |          2        0.18       99.26
         10 |          2        0.18       99.45
         11 |          2        0.18       99.63
         12 |          2        0.18       99.82
         13 |          1        0.09       99.91
         14 |          1        0.09      100.00
------------+-----------------------------------
      Total |      1,084      100.00

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