Frequencies for first 10,000 rows of dr_sf3 variable in vehicle dataset :

     driver |
    related |
 factors (4 |
   choices) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,411       94.11       94.11
         23 |          1        0.01       94.12
         24 |          1        0.01       94.13
         26 |          1        0.01       94.14
         28 |          7        0.07       94.21
         31 |          1        0.01       94.22
         33 |          1        0.01       94.23
         35 |          1        0.01       94.24
         36 |          7        0.07       94.31
         37 |          3        0.03       94.34
         38 |          1        0.01       94.35
         39 |         10        0.10       94.45
         47 |          1        0.01       94.46
         48 |          2        0.02       94.48
         51 |          2        0.02       94.50
         52 |          8        0.08       94.58
         53 |          4        0.04       94.62
         58 |          7        0.07       94.69
         73 |          4        0.04       94.73
         80 |          2        0.02       94.75
         84 |          2        0.02       94.77
         85 |          1        0.01       94.78
         87 |          6        0.06       94.84
         88 |          1        0.01       94.85
         89 |          1        0.01       94.86
         91 |         24        0.24       95.10
         99 |        490        4.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016