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

     veh_no |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,284       12.84       12.84
          1 |      5,786       57.86       70.70
          2 |      2,318       23.18       93.88
          3 |        421        4.21       98.09
          4 |        120        1.20       99.29
          5 |         41        0.41       99.70
          6 |         11        0.11       99.81
          7 |          6        0.06       99.87
          8 |          5        0.05       99.92
          9 |          3        0.03       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