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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        725        7.25        7.25
          1 |      6,155       61.55       68.80
          2 |      2,507       25.07       93.87
          3 |        439        4.39       98.26
          4 |         69        0.69       98.95
          5 |         32        0.32       99.27
          6 |         14        0.14       99.41
          7 |          8        0.08       99.49
          8 |          6        0.06       99.55
          9 |         12        0.12       99.67
         10 |         10        0.10       99.77
         11 |          7        0.07       99.84
         12 |          4        0.04       99.88
         13 |          2        0.02       99.90
         14 |          2        0.02       99.92
         15 |          3        0.03       99.95
         16 |          3        0.03       99.98
         17 |          1        0.01       99.99
         18 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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