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

     Driver |
    Related |
   Factor 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,662       56.62       56.62
          1 |        100        1.00       57.62
          2 |         15        0.15       57.77
          4 |          9        0.09       57.86
          5 |         25        0.25       58.11
          6 |        799        7.99       66.10
          7 |         14        0.14       66.24
         20 |          2        0.02       66.26
         21 |         10        0.10       66.36
         22 |          3        0.03       66.39
         23 |         30        0.30       66.69
         24 |         54        0.54       67.23
         26 |         17        0.17       67.40
         27 |         22        0.22       67.62
         28 |      1,238       12.38       80.00
         29 |          4        0.04       80.04
         30 |         14        0.14       80.18
         31 |          9        0.09       80.27
         33 |         11        0.11       80.38
         34 |          6        0.06       80.44
         35 |         47        0.47       80.91
         36 |         80        0.80       81.71
         37 |         18        0.18       81.89
         38 |        168        1.68       83.57
         39 |        160        1.60       85.17
         40 |          3        0.03       85.20
         41 |          1        0.01       85.21
         42 |          4        0.04       85.25
         44 |        855        8.55       93.80
         46 |          2        0.02       93.82
         47 |          3        0.03       93.85
         48 |        191        1.91       95.76
         50 |          9        0.09       95.85
         51 |         86        0.86       96.71
         52 |         16        0.16       96.87
         53 |         51        0.51       97.38
         54 |          8        0.08       97.46
         99 |        254        2.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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