Frequencies for vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          9        1.16        1.16
          1 |          8        1.03        2.19
          2 |          6        0.77        2.96
          3 |          2        0.26        3.22
          4 |          2        0.26        3.48
          6 |          7        0.90        4.38
          7 |          3        0.39        4.77
          8 |          1        0.13        4.90
          9 |         92       11.86       16.75
          A |         61        7.86       24.61
          B |         10        1.29       25.90
          C |          5        0.64       26.55
          D |          9        1.16       27.71
          E |         12        1.55       29.25
          F |         78       10.05       39.30
          G |        104       13.40       52.71
          H |         40        5.15       57.86
          J |         10        1.29       59.15
          K |          5        0.64       59.79
          L |         20        2.58       62.37
          M |         80       10.31       72.68
          N |         37        4.77       77.45
          P |          9        1.16       78.61
          Q |          1        0.13       78.74
          R |          3        0.39       79.12
          S |         39        5.03       84.15
          T |         98       12.63       96.78
          V |          7        0.90       97.68
          W |          3        0.39       98.07
          X |          5        0.64       98.71
          Y |          8        1.03       99.74
          Z |          2        0.26      100.00
------------+-----------------------------------
      Total |        776      100.00

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