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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,365       13.65       13.65
          1 |      5,985       59.85       73.50
          2 |      2,271       22.71       96.21
          3 |        299        2.99       99.20
          4 |         48        0.48       99.68
          5 |         12        0.12       99.80
          6 |          4        0.04       99.84
          7 |          5        0.05       99.89
          8 |          2        0.02       99.91
          9 |          2        0.02       99.93
         10 |          1        0.01       99.94
         11 |          1        0.01       99.95
         12 |          1        0.01       99.96
         13 |          1        0.01       99.97
         14 |          1        0.01       99.98
         15 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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