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

     Driver |
    Related |
   Factor 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,989       89.89       89.89
          1 |         27        0.27       90.16
          2 |          2        0.02       90.18
          4 |          1        0.01       90.19
          5 |         12        0.12       90.31
          6 |         66        0.66       90.97
          7 |          5        0.05       91.02
         20 |          1        0.01       91.03
         21 |          4        0.04       91.07
         22 |          3        0.03       91.10
         23 |         11        0.11       91.21
         24 |         26        0.26       91.47
         25 |          1        0.01       91.48
         26 |          1        0.01       91.49
         27 |          4        0.04       91.53
         28 |         77        0.77       92.30
         29 |          2        0.02       92.32
         31 |          1        0.01       92.33
         32 |          1        0.01       92.34
         33 |          5        0.05       92.39
         34 |          3        0.03       92.42
         35 |         13        0.13       92.55
         36 |         30        0.30       92.85
         38 |         22        0.22       93.07
         39 |         31        0.31       93.38
         40 |          1        0.01       93.39
         41 |          1        0.01       93.40
         42 |          1        0.01       93.41
         44 |        179        1.79       95.20
         45 |          1        0.01       95.21
         48 |         39        0.39       95.60
         49 |          3        0.03       95.63
         50 |          1        0.01       95.64
         51 |         51        0.51       96.15
         52 |         16        0.16       96.31
         53 |         44        0.44       96.75
         99 |        325        3.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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