Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.03        0.03
          0 |        717        7.17        7.20
          1 |        859        8.59       15.79
          2 |        985        9.85       25.64
          3 |        749        7.49       33.13
          4 |      1,192       11.92       45.05
          5 |        852        8.52       53.57
          6 |        817        8.17       61.74
          7 |        435        4.35       66.09
          8 |        561        5.61       71.70
          9 |      1,535       15.35       87.05
          A |         90        0.90       87.95
          B |         92        0.92       88.87
          C |         51        0.51       89.38
          D |         32        0.32       89.70
          E |        107        1.07       90.77
          F |        128        1.28       92.05
          G |         27        0.27       92.32
          H |         22        0.22       92.54
          I |          3        0.03       92.57
          J |          4        0.04       92.61
          K |         11        0.11       92.72
          L |        196        1.96       94.68
          M |         13        0.13       94.81
          N |         54        0.54       95.35
          O |          6        0.06       95.41
          P |          3        0.03       95.44
          Q |         21        0.21       95.65
          R |         29        0.29       95.94
          S |         95        0.95       96.89
          T |         65        0.65       97.54
          U |         22        0.22       97.76
          V |         58        0.58       98.34
          X |         13        0.13       98.47
          Y |        128        1.28       99.75
          Z |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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