Frequencies for first 10,000 rows of dr_sf1 variable in vehicle dataset :

     driver |
    related |
 factors (4 |
   choices) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,518       55.18       55.18
          4 |          2        0.02       55.20
          6 |        814        8.14       63.34
          8 |         80        0.80       64.14
         12 |          2        0.02       64.16
         13 |          2        0.02       64.18
         15 |          2        0.02       64.20
         16 |         20        0.20       64.40
         18 |          2        0.02       64.42
         20 |         33        0.33       64.75
         21 |         10        0.10       64.85
         22 |          1        0.01       64.86
         23 |         10        0.10       64.96
         24 |        111        1.11       66.07
         26 |         40        0.40       66.47
         27 |         85        0.85       67.32
         28 |        474        4.74       72.06
         29 |          6        0.06       72.12
         30 |          2        0.02       72.14
         31 |         18        0.18       72.32
         32 |          2        0.02       72.34
         33 |         29        0.29       72.63
         34 |          7        0.07       72.70
         35 |         30        0.30       73.00
         36 |        154        1.54       74.54
         37 |         32        0.32       74.86
         38 |        599        5.99       80.85
         39 |        292        2.92       83.77
         41 |          1        0.01       83.78
         45 |          3        0.03       83.81
         47 |          1        0.01       83.82
         48 |        372        3.72       87.54
         50 |         10        0.10       87.64
         51 |         76        0.76       88.40
         52 |         17        0.17       88.57
         53 |          6        0.06       88.63
         54 |         23        0.23       88.86
         57 |         25        0.25       89.11
         58 |        183        1.83       90.94
         73 |         13        0.13       91.07
         74 |         13        0.13       91.20
         77 |          2        0.02       91.22
         79 |          1        0.01       91.23
         80 |         34        0.34       91.57
         81 |          5        0.05       91.62
         82 |          3        0.03       91.65
         83 |         13        0.13       91.78
         84 |         23        0.23       92.01
         85 |         21        0.21       92.22
         86 |         16        0.16       92.38
         87 |         23        0.23       92.61
         88 |          2        0.02       92.63
         89 |        223        2.23       94.86
         91 |         86        0.86       95.72
         99 |        428        4.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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