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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,196       11.96       11.96
          1 |      5,815       58.15       70.11
          2 |      2,389       23.89       94.00
          3 |        422        4.22       98.22
          4 |        113        1.13       99.35
          5 |         45        0.45       99.80
          6 |         12        0.12       99.92
          7 |          4        0.04       99.96
          8 |          1        0.01       99.97
          9 |          1        0.01       99.98
         10 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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