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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         48        0.48        0.48
          1 |        210        2.10        2.58
          2 |         56        0.56        3.14
          3 |         50        0.50        3.64
          4 |         45        0.45        4.09
          5 |         83        0.83        4.92
          6 |         25        0.25        5.17
          7 |         60        0.60        5.77
          8 |         23        0.23        6.00
          9 |        424        4.24       10.24
          A |        607        6.07       16.31
          B |        658        6.58       22.89
          C |      1,154       11.54       34.43
          D |        687        6.87       41.30
          E |        988        9.88       51.18
          F |        606        6.06       57.24
          G |        492        4.92       62.16
          H |        550        5.50       67.66
          J |        256        2.56       70.22
          K |        153        1.53       71.75
          L |        352        3.52       75.27
          M |        136        1.36       76.63
          N |        266        2.66       79.29
          P |        280        2.80       82.09
          R |        345        3.45       85.54
          S |        364        3.64       89.18
          T |         62        0.62       89.80
          U |         50        0.50       90.30
          V |        146        1.46       91.76
          W |        244        2.44       94.20
          X |         83        0.83       95.03
          Y |        238        2.38       97.41
          Z |        259        2.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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