Frequencies for first 10,000 rows of vin_12 variable in vehicle dataset :

     vin_12 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        292        2.92        2.92
          0 |      1,668       16.68       19.60
          1 |      2,025       20.25       39.85
          2 |      1,185       11.85       51.70
          3 |        703        7.03       58.73
          4 |        419        4.19       62.92
          5 |        761        7.61       70.53
          6 |        565        5.65       76.18
          7 |        401        4.01       80.19
          8 |        245        2.45       82.64
          9 |        486        4.86       87.50
          A |        582        5.82       93.32
          B |        370        3.70       97.02
          C |        137        1.37       98.39
          D |         54        0.54       98.93
          E |         19        0.19       99.12
          F |         15        0.15       99.27
          G |         10        0.10       99.37
          H |          2        0.02       99.39
          J |         23        0.23       99.62
          K |          2        0.02       99.64
          L |          2        0.02       99.66
          M |         16        0.16       99.82
          N |          3        0.03       99.85
          O |          1        0.01       99.86
          P |          1        0.01       99.87
          R |          2        0.02       99.89
          S |          5        0.05       99.94
          U |          3        0.03       99.97
          W |          1        0.01       99.98
          Y |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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