Frequencies for veh_no variable in parkwork dataset :

    vehicle |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         42        3.85        3.85
          2 |        590       54.08       57.93
          3 |        277       25.39       83.32
          4 |        105        9.62       92.94
          5 |         43        3.94       96.88
          6 |         19        1.74       98.63
          7 |          9        0.82       99.45
          8 |          3        0.27       99.73
          9 |          2        0.18       99.91
         10 |          1        0.09      100.00
------------+-----------------------------------
      Total |      1,091      100.00

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