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

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,910       99.10       99.10
          2 |          2        0.02       99.12
          4 |          1        0.01       99.13
          7 |          1        0.01       99.14
         13 |          1        0.01       99.15
         16 |          1        0.01       99.16
         31 |          1        0.01       99.17
         36 |          1        0.01       99.18
         44 |          2        0.02       99.20
         99 |         80        0.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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