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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,181       11.81       11.81
          1 |      5,916       59.16       70.97
          2 |      2,345       23.45       94.42
          3 |        405        4.05       98.47
          4 |         96        0.96       99.43
          5 |         34        0.34       99.77
          6 |         11        0.11       99.88
          7 |          3        0.03       99.91
          8 |          2        0.02       99.93
          9 |          2        0.02       99.95
         10 |          2        0.02       99.97
         11 |          2        0.02       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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