Frequencies for vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         12        1.57        1.57
          1 |          9        1.18        2.75
          2 |          7        0.92        3.66
          3 |          4        0.52        4.19
          4 |          1        0.13        4.32
          5 |          2        0.26        4.58
          6 |          3        0.39        4.97
          7 |          3        0.39        5.37
          8 |          4        0.52        5.89
          9 |         87       11.39       17.28
          A |         72        9.42       26.70
          B |         11        1.44       28.14
          C |          8        1.05       29.19
          D |          7        0.92       30.10
          E |         10        1.31       31.41
          F |         63        8.25       39.66
          G |         97       12.70       52.36
          H |         58        7.59       59.95
          J |          8        1.05       60.99
          K |          7        0.92       61.91
          L |          8        1.05       62.96
          M |         86       11.26       74.21
          N |         42        5.50       79.71
          P |          5        0.65       80.37
          Q |          1        0.13       80.50
          R |          2        0.26       80.76
          S |         20        2.62       83.38
          T |         99       12.96       96.34
          V |          4        0.52       96.86
          W |          2        0.26       97.12
          X |         14        1.83       98.95
          Y |          7        0.92       99.87
          Z |          1        0.13      100.00
------------+-----------------------------------
      Total |        764      100.00

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