Frequencies for vin_6 variable in vehicle dataset :

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         48        6.28        6.28
          1 |        122       15.97       22.25
          2 |        102       13.35       35.60
          3 |        108       14.14       49.74
          4 |         58        7.59       57.33
          5 |         52        6.81       64.14
          6 |         33        4.32       68.46
          7 |         49        6.41       74.87
          8 |         34        4.45       79.32
          9 |        111       14.53       93.85
          A |         11        1.44       95.29
          B |          5        0.65       95.94
          C |          5        0.65       96.60
          D |          2        0.26       96.86
          E |          3        0.39       97.25
          F |          2        0.26       97.51
          G |          1        0.13       97.64
          H |          6        0.79       98.43
          J |          2        0.26       98.69
          K |          1        0.13       98.82
          L |          1        0.13       98.95
          M |          1        0.13       99.08
          N |          1        0.13       99.21
          S |          1        0.13       99.35
          T |          3        0.39       99.74
          X |          1        0.13       99.87
          Y |          1        0.13      100.00
------------+-----------------------------------
      Total |        764      100.00

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