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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,185       11.85       11.85
          1 |      5,837       58.37       70.22
          2 |      2,343       23.43       93.65
          3 |        463        4.63       98.28
          4 |        110        1.10       99.38
          5 |         30        0.30       99.68
          6 |         10        0.10       99.78
          7 |          6        0.06       99.84
          8 |          3        0.03       99.87
          9 |          3        0.03       99.90
         10 |          2        0.02       99.92
         11 |          2        0.02       99.94
         12 |          2        0.02       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