Frequencies for first 10,000 rows of dr_cf2 variable in vehicle dataset :

     Driver |
    Related |
   Factor 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,443       64.43       64.43
          1 |         40        0.40       64.83
          2 |          5        0.05       64.88
          3 |          1        0.01       64.89
          4 |          1        0.01       64.90
          5 |         16        0.16       65.06
          6 |        401        4.01       69.07
          7 |          2        0.02       69.09
         21 |         10        0.10       69.19
         22 |          4        0.04       69.23
         23 |         16        0.16       69.39
         24 |         54        0.54       69.93
         26 |         14        0.14       70.07
         27 |         25        0.25       70.32
         28 |        657        6.57       76.89
         29 |          7        0.07       76.96
         30 |         10        0.10       77.06
         31 |          9        0.09       77.15
         33 |         25        0.25       77.40
         34 |         11        0.11       77.51
         35 |         49        0.49       78.00
         36 |         63        0.63       78.63
         38 |        234        2.34       80.97
         39 |        185        1.85       82.82
         40 |          2        0.02       82.84
         41 |          2        0.02       82.86
         42 |          5        0.05       82.91
         43 |          2        0.02       82.93
         44 |        989        9.89       92.82
         45 |          1        0.01       92.83
         46 |          3        0.03       92.86
         47 |          2        0.02       92.88
         48 |        141        1.41       94.29
         49 |          1        0.01       94.30
         50 |         21        0.21       94.51
         51 |        193        1.93       96.44
         52 |         21        0.21       96.65
         53 |         43        0.43       97.08
         99 |        292        2.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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