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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,217       12.17       12.17
          1 |      5,986       59.86       72.03
          2 |      2,332       23.32       95.35
          3 |        351        3.51       98.86
          4 |         82        0.82       99.68
          5 |         26        0.26       99.94
          6 |          5        0.05       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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