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

     driver |
    related |
 factors (4 |
   choices) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,526       55.26       55.26
          4 |          1        0.01       55.27
          6 |        807        8.07       63.34
          8 |        108        1.08       64.42
         12 |          2        0.02       64.44
         13 |          3        0.03       64.47
         16 |         13        0.13       64.60
         20 |         18        0.18       64.78
         21 |          5        0.05       64.83
         23 |          9        0.09       64.92
         24 |         80        0.80       65.72
         26 |         40        0.40       66.12
         27 |         69        0.69       66.81
         28 |        440        4.40       71.21
         29 |          8        0.08       71.29
         30 |          3        0.03       71.32
         31 |         17        0.17       71.49
         33 |         22        0.22       71.71
         34 |          5        0.05       71.76
         35 |         36        0.36       72.12
         36 |        143        1.43       73.55
         37 |         22        0.22       73.77
         38 |        583        5.83       79.60
         39 |        315        3.15       82.75
         40 |          1        0.01       82.76
         41 |          1        0.01       82.77
         42 |          2        0.02       82.79
         45 |          6        0.06       82.85
         47 |          1        0.01       82.86
         48 |        435        4.35       87.21
         50 |          6        0.06       87.27
         51 |        101        1.01       88.28
         52 |          9        0.09       88.37
         53 |         10        0.10       88.47
         54 |         27        0.27       88.74
         57 |         14        0.14       88.88
         58 |        136        1.36       90.24
         59 |          5        0.05       90.29
         73 |         14        0.14       90.43
         74 |         17        0.17       90.60
         77 |          1        0.01       90.61
         79 |          2        0.02       90.63
         80 |         23        0.23       90.86
         81 |          8        0.08       90.94
         82 |          6        0.06       91.00
         83 |          9        0.09       91.09
         84 |         17        0.17       91.26
         85 |         14        0.14       91.40
         86 |         34        0.34       91.74
         87 |         24        0.24       91.98
         88 |          1        0.01       91.99
         89 |        208        2.08       94.07
         91 |        103        1.03       95.10
         99 |        490        4.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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