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

     driver |
    related |
 factors (4 |
   choices) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,573       55.73       55.73
          4 |          4        0.04       55.77
          6 |        806        8.06       63.83
          8 |         47        0.47       64.30
         12 |          1        0.01       64.31
         15 |          1        0.01       64.32
         16 |         18        0.18       64.50
         20 |         18        0.18       64.68
         21 |         10        0.10       64.78
         22 |          3        0.03       64.81
         23 |          9        0.09       64.90
         24 |         97        0.97       65.87
         26 |         50        0.50       66.37
         27 |         55        0.55       66.92
         28 |        439        4.39       71.31
         29 |          2        0.02       71.33
         30 |          1        0.01       71.34
         31 |         10        0.10       71.44
         32 |          2        0.02       71.46
         33 |         26        0.26       71.72
         34 |          4        0.04       71.76
         35 |         29        0.29       72.05
         36 |        114        1.14       73.19
         37 |         27        0.27       73.46
         38 |        609        6.09       79.55
         39 |        284        2.84       82.39
         41 |          3        0.03       82.42
         42 |          2        0.02       82.44
         45 |          5        0.05       82.49
         47 |          1        0.01       82.50
         48 |        556        5.56       88.06
         50 |         10        0.10       88.16
         51 |        112        1.12       89.28
         52 |         18        0.18       89.46
         53 |          7        0.07       89.53
         54 |         14        0.14       89.67
         57 |         27        0.27       89.94
         58 |        178        1.78       91.72
         73 |         11        0.11       91.83
         74 |         26        0.26       92.09
         77 |          1        0.01       92.10
         79 |          3        0.03       92.13
         80 |         47        0.47       92.60
         81 |          4        0.04       92.64
         82 |          2        0.02       92.66
         83 |         11        0.11       92.77
         84 |         15        0.15       92.92
         85 |          8        0.08       93.00
         86 |         16        0.16       93.16
         87 |         17        0.17       93.33
         89 |        169        1.69       95.02
         91 |         77        0.77       95.79
         99 |        421        4.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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