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

    vehicle |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,505       15.05       15.05
          1 |      5,755       57.55       72.60
          2 |      2,149       21.49       94.09
          3 |        386        3.86       97.95
          4 |        122        1.22       99.17
          5 |         46        0.46       99.63
          6 |         18        0.18       99.81
          7 |          7        0.07       99.88
          8 |          3        0.03       99.91
          9 |          1        0.01       99.92
         10 |          1        0.01       99.93
         11 |          1        0.01       99.94
         12 |          1        0.01       99.95
         13 |          1        0.01       99.96
         14 |          1        0.01       99.97
         15 |          1        0.01       99.98
         16 |          1        0.01       99.99
         17 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016