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

     Driver |
    Related |
   Factor 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,571       55.71       55.71
          1 |         93        0.93       56.64
          2 |          5        0.05       56.69
          3 |          2        0.02       56.71
          4 |          3        0.03       56.74
          5 |         31        0.31       57.05
          6 |        879        8.79       65.84
          7 |          7        0.07       65.91
         20 |          3        0.03       65.94
         21 |         10        0.10       66.04
         22 |          1        0.01       66.05
         23 |         28        0.28       66.33
         24 |         81        0.81       67.14
         26 |         12        0.12       67.26
         27 |         33        0.33       67.59
         28 |      1,097       10.97       78.56
         29 |         11        0.11       78.67
         30 |         13        0.13       78.80
         31 |          9        0.09       78.89
         33 |         16        0.16       79.05
         34 |          9        0.09       79.14
         35 |         34        0.34       79.48
         36 |         90        0.90       80.38
         37 |         22        0.22       80.60
         38 |        170        1.70       82.30
         39 |        129        1.29       83.59
         40 |          2        0.02       83.61
         41 |          2        0.02       83.63
         42 |          6        0.06       83.69
         44 |        957        9.57       93.26
         45 |          3        0.03       93.29
         46 |          2        0.02       93.31
         47 |          4        0.04       93.35
         48 |        280        2.80       96.15
         50 |          2        0.02       96.17
         51 |         94        0.94       97.11
         52 |         15        0.15       97.26
         53 |         33        0.33       97.59
         54 |          8        0.08       97.67
         55 |          2        0.02       97.69
         99 |        231        2.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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