Frequencies for first 10,000 rows of dr_sf2 variable in vehicle dataset :

     driver |
    related |
 factors (4 |
   choices) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,635       86.35       86.35
          6 |          9        0.09       86.44
          8 |         26        0.26       86.70
         13 |          1        0.01       86.71
         15 |          1        0.01       86.72
         18 |          1        0.01       86.73
         19 |          1        0.01       86.74
         21 |          4        0.04       86.78
         23 |          2        0.02       86.80
         24 |          1        0.01       86.81
         26 |         10        0.10       86.91
         27 |         15        0.15       87.06
         28 |         64        0.64       87.70
         29 |          2        0.02       87.72
         30 |          3        0.03       87.75
         31 |          3        0.03       87.78
         33 |         11        0.11       87.89
         34 |          2        0.02       87.91
         35 |         14        0.14       88.05
         36 |         71        0.71       88.76
         37 |         19        0.19       88.95
         38 |         87        0.87       89.82
         39 |         84        0.84       90.66
         40 |          1        0.01       90.67
         41 |          1        0.01       90.68
         42 |          3        0.03       90.71
         47 |          1        0.01       90.72
         48 |         63        0.63       91.35
         50 |          7        0.07       91.42
         51 |         42        0.42       91.84
         52 |         18        0.18       92.02
         53 |         13        0.13       92.15
         54 |          7        0.07       92.22
         58 |         83        0.83       93.05
         73 |         12        0.12       93.17
         74 |          7        0.07       93.24
         80 |          2        0.02       93.26
         83 |          4        0.04       93.30
         84 |          3        0.03       93.33
         85 |          5        0.05       93.38
         86 |          5        0.05       93.43
         87 |         26        0.26       93.69
         89 |         12        0.12       93.81
         91 |         83        0.83       94.64
         99 |        536        5.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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