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

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         57        0.57        0.57
          0 |        747        7.47        8.04
          1 |      1,282       12.82       20.86
          2 |        728        7.28       28.14
          3 |        585        5.85       33.99
          4 |      1,187       11.87       45.86
          5 |        672        6.72       52.58
          6 |        664        6.64       59.22
          7 |        606        6.06       65.28
          8 |        491        4.91       70.19
          9 |      1,058       10.58       80.77
          A |        137        1.37       82.14
          B |         59        0.59       82.73
          C |        129        1.29       84.02
          D |         74        0.74       84.76
          E |         54        0.54       85.30
          F |         66        0.66       85.96
          G |         74        0.74       86.70
          H |         75        0.75       87.45
          I |          1        0.01       87.46
          J |         61        0.61       88.07
          K |         42        0.42       88.49
          L |        163        1.63       90.12
          M |         53        0.53       90.65
          N |         49        0.49       91.14
          P |         61        0.61       91.75
          Q |         44        0.44       92.19
          R |        113        1.13       93.32
          S |        122        1.22       94.54
          T |         21        0.21       94.75
          U |         60        0.60       95.35
          V |         36        0.36       95.71
          W |         41        0.41       96.12
          X |         55        0.55       96.67
          Y |        122        1.22       97.89
          Z |        211        2.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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