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

     Driver |
    Related |
   Factor 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,702       87.02       87.02
          1 |         36        0.36       87.38
          3 |          1        0.01       87.39
          5 |         18        0.18       87.57
          6 |        197        1.97       89.54
          7 |          2        0.02       89.56
         21 |          5        0.05       89.61
         23 |          6        0.06       89.67
         24 |         33        0.33       90.00
         26 |          1        0.01       90.01
         27 |          9        0.09       90.10
         28 |        255        2.55       92.65
         33 |          4        0.04       92.69
         34 |          4        0.04       92.73
         35 |         15        0.15       92.88
         36 |         55        0.55       93.43
         37 |         12        0.12       93.55
         38 |         16        0.16       93.71
         39 |         43        0.43       94.14
         42 |          3        0.03       94.17
         43 |          1        0.01       94.18
         44 |        193        1.93       96.11
         47 |          3        0.03       96.14
         48 |         33        0.33       96.47
         50 |          3        0.03       96.50
         51 |         23        0.23       96.73
         52 |          9        0.09       96.82
         53 |         41        0.41       97.23
         99 |        277        2.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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