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

     Driver |
    Related |
   Factor 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,249       92.49       92.49
          1 |         11        0.11       92.60
          2 |          1        0.01       92.61
          4 |          2        0.02       92.63
          5 |          1        0.01       92.64
          6 |         74        0.74       93.38
         23 |          2        0.02       93.40
         24 |          3        0.03       93.43
         26 |          2        0.02       93.45
         27 |          2        0.02       93.47
         28 |         36        0.36       93.83
         30 |          1        0.01       93.84
         31 |          1        0.01       93.85
         33 |          4        0.04       93.89
         34 |          2        0.02       93.91
         35 |          8        0.08       93.99
         36 |         19        0.19       94.18
         38 |         18        0.18       94.36
         39 |          9        0.09       94.45
         40 |          1        0.01       94.46
         41 |          1        0.01       94.47
         44 |        103        1.03       95.50
         47 |          2        0.02       95.52
         48 |         11        0.11       95.63
         49 |          3        0.03       95.66
         50 |          3        0.03       95.69
         51 |         10        0.10       95.79
         52 |         11        0.11       95.90
         53 |         24        0.24       96.14
         99 |        386        3.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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