Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.03        0.03
          0 |        598        5.98        6.01
          1 |      1,293       12.93       18.94
          2 |      1,035       10.35       29.29
          3 |      1,124       11.24       40.53
          4 |        612        6.12       46.65
          5 |        683        6.83       53.48
          6 |        507        5.07       58.55
          7 |        949        9.49       68.04
          8 |        385        3.85       71.89
          9 |      1,663       16.63       88.52
          A |        167        1.67       90.19
          B |        124        1.24       91.43
          C |         93        0.93       92.36
          D |         37        0.37       92.73
          E |         17        0.17       92.90
          F |         35        0.35       93.25
          G |        117        1.17       94.42
          H |         92        0.92       95.34
          J |         44        0.44       95.78
          K |          5        0.05       95.83
          L |         74        0.74       96.57
          M |         22        0.22       96.79
          N |          6        0.06       96.85
          O |          3        0.03       96.88
          P |          4        0.04       96.92
          Q |          2        0.02       96.94
          R |          8        0.08       97.02
          S |         52        0.52       97.54
          T |         21        0.21       97.75
          U |          4        0.04       97.79
          V |          7        0.07       97.86
          W |          1        0.01       97.87
          X |          5        0.05       97.92
          Y |        206        2.06       99.98
          Z |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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