Frequencies for first 10,000 rows of dr_cf3 variable in vehicle dataset :

     Driver |
    Related |
   Factor 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,226       82.26       82.26
          1 |         72        0.72       82.98
          2 |          2        0.02       83.00
          3 |          4        0.04       83.04
          4 |          6        0.06       83.10
          5 |         36        0.36       83.46
          6 |        427        4.27       87.73
          7 |          7        0.07       87.80
         21 |          6        0.06       87.86
         23 |         11        0.11       87.97
         24 |         23        0.23       88.20
         26 |          4        0.04       88.24
         27 |         16        0.16       88.40
         28 |        363        3.63       92.03
         29 |          1        0.01       92.04
         30 |          7        0.07       92.11
         31 |          1        0.01       92.12
         33 |          8        0.08       92.20
         34 |          3        0.03       92.23
         35 |         17        0.17       92.40
         36 |         97        0.97       93.37
         37 |         14        0.14       93.51
         38 |         21        0.21       93.72
         39 |         47        0.47       94.19
         40 |          2        0.02       94.21
         41 |          3        0.03       94.24
         42 |          2        0.02       94.26
         44 |        142        1.42       95.68
         45 |          1        0.01       95.69
         47 |          2        0.02       95.71
         48 |         97        0.97       96.68
         50 |          5        0.05       96.73
         51 |         14        0.14       96.87
         52 |         19        0.19       97.06
         53 |         39        0.39       97.45
         54 |          1        0.01       97.46
         99 |        254        2.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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