Frequencies for vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         18        2.88        2.88
          1 |          2        0.32        3.19
          2 |          1        0.16        3.35
          3 |          2        0.32        3.67
          7 |          2        0.32        3.99
          8 |          1        0.16        4.15
          9 |         70       11.18       15.34
          A |         58        9.27       24.60
          B |         11        1.76       26.36
          C |          4        0.64       27.00
          D |          1        0.16       27.16
          E |          3        0.48       27.64
          F |         74       11.82       39.46
          G |         55        8.79       48.24
          H |         50        7.99       56.23
          J |         11        1.76       57.99
          K |          8        1.28       59.27
          L |          5        0.80       60.06
          M |         67       10.70       70.77
          N |         32        5.11       75.88
          P |          3        0.48       76.36
          R |          1        0.16       76.52
          S |         47        7.51       84.03
          T |         76       12.14       96.17
          U |          2        0.32       96.49
          V |          8        1.28       97.76
          X |          1        0.16       97.92
          Y |         10        1.60       99.52
          Z |          3        0.48      100.00
------------+-----------------------------------
      Total |        626      100.00

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