Frequencies for first 10,000 rows of veh_cf1 variable in vehicle dataset :

    RELATED |
   FACTOR 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,197       91.97       91.97
          1 |        137        1.37       93.34
          2 |         22        0.22       93.56
          3 |          1        0.01       93.57
          4 |          2        0.02       93.59
          5 |          7        0.07       93.66
          7 |          8        0.08       93.74
          8 |          1        0.01       93.75
          9 |          3        0.03       93.78
         14 |          3        0.03       93.81
         15 |          2        0.02       93.83
         16 |          2        0.02       93.85
         18 |         18        0.18       94.03
         19 |          2        0.02       94.05
         31 |        457        4.57       98.62
         32 |         31        0.31       98.93
         33 |          2        0.02       98.95
         35 |          2        0.02       98.97
         36 |          2        0.02       98.99
         37 |          1        0.01       99.00
         39 |          2        0.02       99.02
         40 |          1        0.01       99.03
         41 |          2        0.02       99.05
         42 |          5        0.05       99.10
         43 |          3        0.03       99.13
         99 |         87        0.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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