Frequencies for first 10,000 rows of vin_4 variable in vehicle dataset :

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         95        0.95        0.95
          1 |        258        2.58        3.53
          2 |        142        1.42        4.95
          3 |        107        1.07        6.02
          4 |        105        1.05        7.07
          5 |        104        1.04        8.11
          6 |         56        0.56        8.67
          7 |        119        1.19        9.86
          8 |         53        0.53       10.39
          9 |        466        4.66       15.05
          A |        807        8.07       23.12
          B |        928        9.28       32.40
          C |      1,013       10.13       42.53
          D |        558        5.58       48.11
          E |        734        7.34       55.45
          F |        476        4.76       60.21
          G |        475        4.75       64.96
          H |        491        4.91       69.87
          J |        262        2.62       72.49
          K |        139        1.39       73.88
          L |        383        3.83       77.71
          M |        148        1.48       79.19
          N |        224        2.24       81.43
          P |        322        3.22       84.65
          Q |          1        0.01       84.66
          R |        310        3.10       87.76
          S |        368        3.68       91.44
          T |         55        0.55       91.99
          U |         62        0.62       92.61
          V |        147        1.47       94.08
          W |        239        2.39       96.47
          X |         69        0.69       97.16
          Y |        200        2.00       99.16
          Z |         84        0.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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