Frequencies for first 10,000 rows of veh_cf2 variable in vehicle dataset :

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,880       98.80       98.80
          1 |          1        0.01       98.81
          2 |          2        0.02       98.83
          3 |          1        0.01       98.84
          4 |          2        0.02       98.86
          6 |          1        0.01       98.87
          7 |          1        0.01       98.88
          8 |          1        0.01       98.89
         18 |          3        0.03       98.92
         32 |          1        0.01       98.93
         33 |          1        0.01       98.94
         43 |          1        0.01       98.95
         99 |        105        1.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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