Frequencies for first 10,000 rows of vin_3 variable in vehicle dataset :

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        547        5.47        5.47
          1 |      1,092       10.92       16.39
          2 |      1,095       10.95       27.34
          3 |        793        7.93       35.27
          4 |      1,074       10.74       46.01
          5 |        627        6.27       52.28
          6 |        686        6.86       59.14
          7 |        342        3.42       62.56
          8 |        521        5.21       67.77
          9 |        918        9.18       76.95
          A |        430        4.30       81.25
          B |        120        1.20       82.45
          C |        198        1.98       84.43
          D |        107        1.07       85.50
          E |        150        1.50       87.00
          F |         99        0.99       87.99
          G |         30        0.30       88.29
          H |         15        0.15       88.44
          I |          9        0.09       88.53
          J |         11        0.11       88.64
          K |         35        0.35       88.99
          L |        210        2.10       91.09
          M |        130        1.30       92.39
          N |         69        0.69       93.08
          O |          5        0.05       93.13
          P |         47        0.47       93.60
          Q |         11        0.11       93.71
          R |         35        0.35       94.06
          S |         96        0.96       95.02
          T |        248        2.48       97.50
          U |         75        0.75       98.25
          V |         28        0.28       98.53
          W |         42        0.42       98.95
          X |         14        0.14       99.09
          Y |         74        0.74       99.83
          Z |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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