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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,071       10.71       10.71
          1 |      5,949       59.49       70.20
          2 |      2,377       23.77       93.97
          3 |        413        4.13       98.10
          4 |        111        1.11       99.21
          5 |         36        0.36       99.57
          6 |         19        0.19       99.76
          7 |         11        0.11       99.87
          8 |          6        0.06       99.93
          9 |          2        0.02       99.95
         10 |          2        0.02       99.97
         12 |          1        0.01       99.98
         13 |          1        0.01       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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