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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          0 |        421        4.21        4.22
          1 |      2,509       25.09       29.31
          2 |      1,168       11.68       40.99
          3 |        901        9.01       50.00
          4 |        720        7.20       57.20
          5 |      1,425       14.25       71.45
          6 |        596        5.96       77.41
          7 |        508        5.08       82.49
          8 |        267        2.67       85.16
          9 |        537        5.37       90.53
          A |        115        1.15       91.68
          B |        203        2.03       93.71
          C |         66        0.66       94.37
          D |         52        0.52       94.89
          E |         33        0.33       95.22
          F |         23        0.23       95.45
          G |         32        0.32       95.77
          H |         33        0.33       96.10
          J |         35        0.35       96.45
          K |         12        0.12       96.57
          L |         23        0.23       96.80
          M |         48        0.48       97.28
          N |         11        0.11       97.39
          P |         17        0.17       97.56
          R |         33        0.33       97.89
          S |         74        0.74       98.63
          T |         13        0.13       98.76
          U |         21        0.21       98.97
          V |         15        0.15       99.12
          W |         25        0.25       99.37
          X |         25        0.25       99.62
          Y |          6        0.06       99.68
          Z |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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