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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,371       13.71       13.71
          1 |      5,834       58.34       72.05
          2 |      2,301       23.01       95.06
          3 |        359        3.59       98.65
          4 |         80        0.80       99.45
          5 |         31        0.31       99.76
          6 |         11        0.11       99.87
          7 |          3        0.03       99.90
          8 |          2        0.02       99.92
          9 |          2        0.02       99.94
         10 |          2        0.02       99.96
         11 |          2        0.02       99.98
         12 |          1        0.01       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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