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

     Driver |
    Related |
   Factor 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,272       92.72       92.72
          1 |         19        0.19       92.91
          2 |          3        0.03       92.94
          4 |          1        0.01       92.95
          5 |          1        0.01       92.96
          6 |         41        0.41       93.37
          7 |          1        0.01       93.38
         21 |          4        0.04       93.42
         23 |          4        0.04       93.46
         24 |         14        0.14       93.60
         26 |          9        0.09       93.69
         27 |          5        0.05       93.74
         28 |         46        0.46       94.20
         29 |          2        0.02       94.22
         30 |          3        0.03       94.25
         31 |          2        0.02       94.27
         33 |          5        0.05       94.32
         34 |          2        0.02       94.34
         35 |         12        0.12       94.46
         36 |         27        0.27       94.73
         38 |         27        0.27       95.00
         39 |         26        0.26       95.26
         40 |          1        0.01       95.27
         44 |         87        0.87       96.14
         45 |          1        0.01       96.15
         48 |         23        0.23       96.38
         49 |          1        0.01       96.39
         50 |          2        0.02       96.41
         51 |         18        0.18       96.59
         52 |         15        0.15       96.74
         53 |         36        0.36       97.10
         99 |        290        2.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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