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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          1        0.01        0.01
          0 |        562        5.62        5.63
          1 |      1,171       11.71       17.34
          2 |        966        9.66       27.00
          3 |        741        7.41       34.41
          4 |        499        4.99       39.40
          5 |        468        4.68       44.08
          6 |        316        3.16       47.24
          7 |      1,075       10.75       57.99
          8 |        302        3.02       61.01
          9 |      1,092       10.92       71.93
          A |        559        5.59       77.52
          B |        502        5.02       82.54
          C |        202        2.02       84.56
          D |        123        1.23       85.79
          E |         98        0.98       86.77
          F |         75        0.75       87.52
          G |        181        1.81       89.33
          H |        137        1.37       90.70
          J |         69        0.69       91.39
          K |         99        0.99       92.38
          L |         75        0.75       93.13
          M |         55        0.55       93.68
          N |         22        0.22       93.90
          O |          1        0.01       93.91
          P |         67        0.67       94.58
          Q |          3        0.03       94.61
          R |        148        1.48       96.09
          S |        131        1.31       97.40
          T |         59        0.59       97.99
          U |         24        0.24       98.23
          V |         10        0.10       98.33
          W |         27        0.27       98.60
          X |          4        0.04       98.64
          Y |        120        1.20       99.84
          Z |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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