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

     Driver |
    Related |
 Factors (4 |
   choices) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,059       50.59       50.59
          4 |          2        0.02       50.61
          8 |         57        0.57       51.18
         12 |          3        0.03       51.21
         13 |          1        0.01       51.22
         15 |          1        0.01       51.23
         16 |         15        0.15       51.38
         20 |         21        0.21       51.59
         21 |          4        0.04       51.63
         22 |          3        0.03       51.66
         23 |          8        0.08       51.74
         24 |         33        0.33       52.07
         26 |         34        0.34       52.41
         27 |         68        0.68       53.09
         28 |        424        4.24       57.33
         29 |          7        0.07       57.40
         30 |          3        0.03       57.43
         31 |         27        0.27       57.70
         33 |         31        0.31       58.01
         34 |         11        0.11       58.12
         35 |         38        0.38       58.50
         36 |        656        6.56       65.06
         37 |         24        0.24       65.30
         38 |        643        6.43       71.73
         39 |        353        3.53       75.26
         40 |          3        0.03       75.29
         41 |          5        0.05       75.34
         42 |          3        0.03       75.37
         45 |          5        0.05       75.42
         47 |          1        0.01       75.43
         48 |        584        5.84       81.27
         50 |          5        0.05       81.32
         51 |         98        0.98       82.30
         52 |         27        0.27       82.57
         53 |         12        0.12       82.69
         54 |         17        0.17       82.86
         57 |         11        0.11       82.97
         58 |        189        1.89       84.86
         59 |          2        0.02       84.88
         73 |         19        0.19       85.07
         74 |         45        0.45       85.52
         77 |          1        0.01       85.53
         79 |          8        0.08       85.61
         80 |         34        0.34       85.95
         81 |         11        0.11       86.06
         82 |          5        0.05       86.11
         83 |          9        0.09       86.20
         84 |         20        0.20       86.40
         85 |         19        0.19       86.59
         86 |         22        0.22       86.81
         87 |         52        0.52       87.33
         88 |          6        0.06       87.39
         89 |        184        1.84       89.23
         91 |         79        0.79       90.02
         92 |        575        5.75       95.77
         99 |        423        4.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016