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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         40        0.40        0.40
          0 |        928        9.28        9.68
          1 |      1,336       13.36       23.04
          2 |        835        8.35       31.39
          3 |        609        6.09       37.48
          4 |        535        5.35       42.83
          5 |        664        6.64       49.47
          6 |        613        6.13       55.60
          7 |        673        6.73       62.33
          8 |        662        6.62       68.95
          9 |      1,423       14.23       83.18
          A |        380        3.80       86.98
          B |        112        1.12       88.10
          C |         80        0.80       88.90
          D |         74        0.74       89.64
          E |        102        1.02       90.66
          F |         76        0.76       91.42
          G |         53        0.53       91.95
          H |        157        1.57       93.52
          I |          1        0.01       93.53
          J |         39        0.39       93.92
          K |         49        0.49       94.41
          L |         66        0.66       95.07
          M |         22        0.22       95.29
          N |         33        0.33       95.62
          O |          2        0.02       95.64
          P |         65        0.65       96.29
          Q |         12        0.12       96.41
          R |         52        0.52       96.93
          S |         49        0.49       97.42
          T |         62        0.62       98.04
          U |         33        0.33       98.37
          V |         12        0.12       98.49
          W |         15        0.15       98.64
          X |         16        0.16       98.80
          Y |         32        0.32       99.12
          Z |         88        0.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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