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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         43        0.43        0.43
          1 |        236        2.36        2.79
          2 |         35        0.35        3.14
          3 |         31        0.31        3.45
          4 |         48        0.48        3.93
          5 |         85        0.85        4.78
          6 |         18        0.18        4.96
          7 |         35        0.35        5.31
          8 |         20        0.20        5.51
          9 |        476        4.76       10.27
          A |        546        5.46       15.73
          B |        592        5.92       21.65
          C |        941        9.41       31.06
          D |        658        6.58       37.64
          E |      1,146       11.46       49.10
          F |        654        6.54       55.64
          G |        603        6.03       61.67
          H |        567        5.67       67.34
          J |        305        3.05       70.39
          K |        176        1.76       72.15
          L |        272        2.72       74.87
          M |         92        0.92       75.79
          N |        289        2.89       78.68
          P |        230        2.30       80.98
          R |        364        3.64       84.62
          S |        347        3.47       88.09
          T |         65        0.65       88.74
          U |         42        0.42       89.16
          V |        151        1.51       90.67
          W |        303        3.03       93.70
          X |         46        0.46       94.16
          Y |        231        2.31       96.47
          Z |        353        3.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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