Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         85        0.85        0.85
          0 |        694        6.94        7.79
          1 |      1,253       12.53       20.32
          2 |        715        7.15       27.47
          3 |        549        5.49       32.96
          4 |      1,191       11.91       44.87
          5 |        681        6.81       51.68
          6 |        615        6.15       57.83
          7 |        606        6.06       63.89
          8 |        547        5.47       69.36
          9 |      1,063       10.63       79.99
          A |        168        1.68       81.67
          B |         80        0.80       82.47
          C |        130        1.30       83.77
          D |         69        0.69       84.46
          E |         43        0.43       84.89
          F |         76        0.76       85.65
          G |         89        0.89       86.54
          H |         71        0.71       87.25
          I |          3        0.03       87.28
          J |         67        0.67       87.95
          K |         52        0.52       88.47
          L |        152        1.52       89.99
          M |         60        0.60       90.59
          N |         47        0.47       91.06
          O |          1        0.01       91.07
          P |         75        0.75       91.82
          Q |         50        0.50       92.32
          R |         82        0.82       93.14
          S |        118        1.18       94.32
          T |         18        0.18       94.50
          U |         72        0.72       95.22
          V |         30        0.30       95.52
          W |         43        0.43       95.95
          X |         72        0.72       96.67
          Y |        116        1.16       97.83
          Z |        217        2.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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