Frequencies for vin_7 variable in vehnit dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.27        0.27
          0 |         30        2.69        2.96
          1 |        109        9.77       12.72
          2 |        144       12.90       25.63
          3 |        134       12.01       37.63
          4 |        131       11.74       49.37
          5 |         78        6.99       56.36
          6 |        134       12.01       68.37
          7 |         51        4.57       72.94
          8 |        106        9.50       82.44
          9 |        101        9.05       91.49
          A |         13        1.16       92.65
          B |          8        0.72       93.37
          C |         23        2.06       95.43
          D |          5        0.45       95.88
          E |          8        0.72       96.59
          F |          1        0.09       96.68
          G |          1        0.09       96.77
          H |          4        0.36       97.13
          J |          3        0.27       97.40
          M |          1        0.09       97.49
          N |          2        0.18       97.67
          P |          5        0.45       98.12
          R |          2        0.18       98.30
          S |          1        0.09       98.39
          T |          3        0.27       98.66
          V |          3        0.27       98.92
          X |          2        0.18       99.10
          Y |          7        0.63       99.73
          Z |          3        0.27      100.00
------------+-----------------------------------
      Total |      1,116      100.00

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