Frequencies for first 10,000 rows of dr_cf4 variable in vehicle dataset :

     dr_cf4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,343       93.43       93.43
          1 |          7        0.07       93.50
          2 |          2        0.02       93.52
          3 |          2        0.02       93.54
          4 |          1        0.01       93.55
          6 |         11        0.11       93.66
         11 |          1        0.01       93.67
         21 |          2        0.02       93.69
         23 |          1        0.01       93.70
         24 |         20        0.20       93.90
         26 |          2        0.02       93.92
         27 |          3        0.03       93.95
         28 |         35        0.35       94.30
         29 |          2        0.02       94.32
         30 |          2        0.02       94.34
         33 |          5        0.05       94.39
         35 |          3        0.03       94.42
         36 |         13        0.13       94.55
         37 |          5        0.05       94.60
         38 |          1        0.01       94.61
         39 |         12        0.12       94.73
         41 |          1        0.01       94.74
         44 |         36        0.36       95.10
         48 |         33        0.33       95.43
         49 |          1        0.01       95.44
         51 |          1        0.01       95.45
         52 |         12        0.12       95.57
         53 |          7        0.07       95.64
         56 |          1        0.01       95.65
         57 |          7        0.07       95.72
         58 |         53        0.53       96.25
         61 |          2        0.02       96.27
         62 |          1        0.01       96.28
         77 |          2        0.02       96.30
         79 |          1        0.01       96.31
         80 |          9        0.09       96.40
         81 |          1        0.01       96.41
         82 |          1        0.01       96.42
         83 |          1        0.01       96.43
         84 |          5        0.05       96.48
         85 |          2        0.02       96.50
         87 |          9        0.09       96.59
         90 |          4        0.04       96.63
         91 |         79        0.79       97.42
         92 |          8        0.08       97.50
         97 |          1        0.01       97.51
         98 |          1        0.01       97.52
         99 |        248        2.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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