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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         60        0.60        0.60
          1 |        260        2.60        3.20
          2 |        105        1.05        4.25
          3 |        101        1.01        5.26
          4 |         92        0.92        6.18
          5 |         93        0.93        7.11
          6 |         32        0.32        7.43
          7 |         91        0.91        8.34
          8 |         31        0.31        8.65
          9 |        397        3.97       12.62
          A |        681        6.81       19.43
          B |        807        8.07       27.50
          C |      1,045       10.45       37.95
          D |        649        6.49       44.44
          E |        843        8.43       52.87
          F |        595        5.95       58.82
          G |        467        4.67       63.49
          H |        519        5.19       68.68
          J |        295        2.95       71.63
          K |        166        1.66       73.29
          L |        348        3.48       76.77
          M |        147        1.47       78.24
          N |        234        2.34       80.58
          P |        340        3.40       83.98
          R |        340        3.40       87.38
          S |        345        3.45       90.83
          T |         55        0.55       91.38
          U |         58        0.58       91.96
          V |        115        1.15       93.11
          W |        230        2.30       95.41
          X |         77        0.77       96.18
          Y |        227        2.27       98.45
          Z |        153        1.53       99.98
          g |          1        0.01       99.99
          w |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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