Frequencies for first 10,000 rows of vin_6 variable in vehicle dataset :

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         39        0.39        0.39
          0 |        877        8.77        9.16
          1 |      1,735       17.35       26.51
          2 |      1,003       10.03       36.54
          3 |        693        6.93       43.47
          4 |        560        5.60       49.07
          5 |        760        7.60       56.67
          6 |        828        8.28       64.95
          7 |        582        5.82       70.77
          8 |        622        6.22       76.99
          9 |        980        9.80       86.79
          A |        229        2.29       89.08
          B |        101        1.01       90.09
          C |         84        0.84       90.93
          D |         82        0.82       91.75
          E |         63        0.63       92.38
          F |         62        0.62       93.00
          G |         53        0.53       93.53
          H |        138        1.38       94.91
          I |          1        0.01       94.92
          J |         49        0.49       95.41
          K |         44        0.44       95.85
          L |         53        0.53       96.38
          M |         25        0.25       96.63
          N |         31        0.31       96.94
          O |          1        0.01       96.95
          P |         35        0.35       97.30
          Q |          7        0.07       97.37
          R |         31        0.31       97.68
          S |         42        0.42       98.10
          T |         37        0.37       98.47
          U |         20        0.20       98.67
          V |         17        0.17       98.84
          W |         12        0.12       98.96
          X |         13        0.13       99.09
          Y |         33        0.33       99.42
          Z |         58        0.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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