Frequencies for vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         24        3.14        3.14
          1 |         16        2.09        5.24
          2 |         10        1.31        6.54
          3 |          8        1.05        7.59
          4 |         10        1.31        8.90
          5 |          7        0.92        9.82
          6 |          5        0.65       10.47
          7 |         28        3.66       14.14
          8 |          7        0.92       15.05
          9 |         87       11.39       26.44
          A |         99       12.96       39.40
          B |         75        9.82       49.21
          C |         52        6.81       56.02
          D |         20        2.62       58.64
          E |         67        8.77       67.41
          F |         21        2.75       70.16
          G |         30        3.93       74.08
          H |         25        3.27       77.36
          J |         16        2.09       79.45
          K |          3        0.39       79.84
          L |          8        1.05       80.89
          M |         18        2.36       83.25
          N |          4        0.52       83.77
          P |         27        3.53       87.30
          R |         12        1.57       88.87
          S |         10        1.31       90.18
          T |         16        2.09       92.28
          U |          4        0.52       92.80
          V |         33        4.32       97.12
          W |         16        2.09       99.21
          X |          1        0.13       99.35
          Y |          1        0.13       99.48
          Z |          4        0.52      100.00
------------+-----------------------------------
      Total |        764      100.00

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