Frequencies for veh_no variable in vehnit dataset :

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         76        5.97        5.97
          2 |        651       51.18       57.15
          3 |        315       24.76       81.92
          4 |        123        9.67       91.59
          5 |         51        4.01       95.60
          6 |         19        1.49       97.09
          7 |         11        0.86       97.96
          8 |          6        0.47       98.43
          9 |          5        0.39       98.82
         10 |          4        0.31       99.14
         11 |          3        0.24       99.37
         12 |          2        0.16       99.53
         13 |          2        0.16       99.69
         14 |          1        0.08       99.76
         15 |          1        0.08       99.84
         16 |          1        0.08       99.92
         17 |          1        0.08      100.00
------------+-----------------------------------
      Total |      1,272      100.00

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