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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        797        7.97        7.97
          1 |      6,199       61.99       69.96
          2 |      2,503       25.03       94.99
          3 |        357        3.57       98.56
          4 |         71        0.71       99.27
          5 |         22        0.22       99.49
          6 |         16        0.16       99.65
          7 |         13        0.13       99.78
          8 |          5        0.05       99.83
          9 |          5        0.05       99.88
         10 |          3        0.03       99.91
         11 |          2        0.02       99.93
         12 |          1        0.01       99.94
         13 |          1        0.01       99.95
         14 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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