Frequencies for first 10,000 rows of dr_cf1 variable in vehicle dataset :

     Driver |
    Related |
   Factor 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,414       34.14       34.14
          1 |         98        0.98       35.12
          2 |         10        0.10       35.22
          4 |          5        0.05       35.27
          5 |         23        0.23       35.50
          6 |        801        8.01       43.51
          7 |          6        0.06       43.57
         20 |         51        0.51       44.08
         21 |         28        0.28       44.36
         22 |         11        0.11       44.47
         23 |         31        0.31       44.78
         24 |         61        0.61       45.39
         26 |         23        0.23       45.62
         27 |         23        0.23       45.85
         28 |      1,385       13.85       59.70
         29 |          7        0.07       59.77
         30 |          6        0.06       59.83
         31 |         14        0.14       59.97
         32 |          1        0.01       59.98
         33 |         16        0.16       60.14
         34 |         12        0.12       60.26
         35 |         59        0.59       60.85
         36 |         67        0.67       61.52
         37 |         16        0.16       61.68
         38 |        547        5.47       67.15
         39 |        361        3.61       70.76
         40 |          4        0.04       70.80
         41 |          2        0.02       70.82
         42 |          4        0.04       70.86
         43 |          1        0.01       70.87
         44 |      2,158       21.58       92.45
         45 |          3        0.03       92.48
         47 |          2        0.02       92.50
         48 |        165        1.65       94.15
         49 |          1        0.01       94.16
         50 |         55        0.55       94.71
         51 |        218        2.18       96.89
         52 |          7        0.07       96.96
         53 |         17        0.17       97.13
         54 |         33        0.33       97.46
         99 |        254        2.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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