Frequencies for vin_11 variable in vehicle dataset :

     vin_11 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         23        3.01        3.01
          0 |        138       18.06       21.07
          1 |         33        4.32       25.39
          2 |         24        3.14       28.53
          3 |         17        2.23       30.76
          4 |         18        2.36       33.12
          5 |         23        3.01       36.13
          6 |         12        1.57       37.70
          7 |         28        3.66       41.36
          8 |         13        1.70       43.06
          9 |         99       12.96       56.02
          A |         15        1.96       57.98
          B |         11        1.44       59.42
          C |         18        2.36       61.78
          D |          6        0.79       62.57
          E |          3        0.39       62.96
          F |         13        1.70       64.66
          G |          8        1.05       65.71
          H |         29        3.80       69.50
          J |         12        1.57       71.07
          K |         16        2.09       73.17
          L |         10        1.31       74.48
          M |         15        1.96       76.44
          N |         13        1.70       78.14
          P |          9        1.18       79.32
          R |          3        0.39       79.71
          S |         13        1.70       81.41
          T |         13        1.70       83.12
          U |        101       13.22       96.34
          V |          2        0.26       96.60
          W |          8        1.05       97.64
          X |          4        0.52       98.17
          Y |          4        0.52       98.69
          Z |         10        1.31      100.00
------------+-----------------------------------
      Total |        764      100.00

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