Frequencies for first 10,000 rows of veh_no variable in miper dataset :

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,122       11.22       11.22
          1 |      5,857       58.57       69.79
          2 |      2,408       24.08       93.87
          3 |        436        4.36       98.23
          4 |        108        1.08       99.31
          5 |         40        0.40       99.71
          6 |         14        0.14       99.85
          7 |          7        0.07       99.92
          8 |          5        0.05       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016