Frequencies for first 10,000 rows of v_config variable in vehicle dataset :

    VEHICLE |
CONFIGURATI |
         ON |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,032       90.32       90.32
          1 |        107        1.07       91.39
          2 |         79        0.79       92.18
          3 |         22        0.22       92.40
          4 |         11        0.11       92.51
          5 |         19        0.19       92.70
          6 |        485        4.85       97.55
          7 |         56        0.56       98.11
         19 |         11        0.11       98.22
         20 |          3        0.03       98.25
         21 |         56        0.56       98.81
         99 |        119        1.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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