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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,296       12.96       12.96
          1 |      5,840       58.40       71.36
          2 |      2,335       23.35       94.71
          3 |        373        3.73       98.44
          4 |         84        0.84       99.28
          5 |         29        0.29       99.57
          6 |         16        0.16       99.73
          7 |         10        0.10       99.83
          8 |          5        0.05       99.88
          9 |          5        0.05       99.93
         10 |          2        0.02       99.95
         11 |          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