Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         92        0.92        0.92
          0 |        795        7.95        8.87
          1 |      1,015       10.15       19.02
          2 |        627        6.27       25.29
          3 |        555        5.55       30.84
          4 |        987        9.87       40.71
          5 |        606        6.06       46.77
          6 |        569        5.69       52.46
          7 |        680        6.80       59.26
          8 |        568        5.68       64.94
          9 |      1,125       11.25       76.19
          A |        183        1.83       78.02
          B |         75        0.75       78.77
          C |        140        1.40       80.17
          D |        105        1.05       81.22
          E |         69        0.69       81.91
          F |         78        0.78       82.69
          G |        128        1.28       83.97
          H |         94        0.94       84.91
          I |          1        0.01       84.92
          J |         74        0.74       85.66
          K |         63        0.63       86.29
          L |        198        1.98       88.27
          M |         62        0.62       88.89
          N |         71        0.71       89.60
          P |         85        0.85       90.45
          Q |         56        0.56       91.01
          R |        134        1.34       92.35
          S |        155        1.55       93.90
          T |         17        0.17       94.07
          U |         77        0.77       94.84
          V |         74        0.74       95.58
          W |         51        0.51       96.09
          X |         74        0.74       96.83
          Y |         83        0.83       97.66
          Z |        234        2.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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