Frequencies for veh_no variable in parkwork dataset :

    vehicle |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         54        4.96        4.96
          2 |        581       53.35       58.31
          3 |        269       24.70       83.01
          4 |        102        9.37       92.38
          5 |         41        3.76       96.14
          6 |         17        1.56       97.70
          7 |         11        1.01       98.71
          8 |          4        0.37       99.08
          9 |          2        0.18       99.27
         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 |      1,089      100.00

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