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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         71        0.71        0.71
          1 |      1,053       10.53       11.24
          2 |        733        7.33       18.57
          3 |        775        7.75       26.32
          4 |        979        9.79       36.11
          5 |         52        0.52       36.63
          6 |        256        2.56       39.19
          7 |        272        2.72       41.91
          8 |        217        2.17       44.08
          9 |        424        4.24       48.32
          A |        870        8.70       57.02
          B |        170        1.70       58.72
          C |        518        5.18       63.90
          D |        279        2.79       66.69
          E |        135        1.35       68.04
          F |         40        0.40       68.44
          G |        349        3.49       71.93
          H |         90        0.90       72.83
          J |         33        0.33       73.16
          K |        183        1.83       74.99
          L |         52        0.52       75.51
          M |        642        6.42       81.93
          N |        348        3.48       85.41
          P |        106        1.06       86.47
          R |         16        0.16       86.63
          S |         76        0.76       87.39
          T |        762        7.62       95.01
          U |        213        2.13       97.14
          V |         66        0.66       97.80
          W |         91        0.91       98.71
          X |         95        0.95       99.66
          Y |         22        0.22       99.88
          Z |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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