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

      vin_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          5        0.05        0.05
          0 |        855        8.55        8.60
          1 |        886        8.86       17.46
          2 |      1,063       10.63       28.09
          3 |        618        6.18       34.27
          4 |      1,315       13.15       47.42
          5 |        874        8.74       56.16
          6 |        903        9.03       65.19
          7 |        453        4.53       69.72
          8 |        494        4.94       74.66
          9 |      1,497       14.97       89.63
          A |        118        1.18       90.81
          B |         38        0.38       91.19
          C |         30        0.30       91.49
          D |         14        0.14       91.63
          E |        146        1.46       93.09
          F |        120        1.20       94.29
          G |         17        0.17       94.46
          H |         21        0.21       94.67
          I |          1        0.01       94.68
          J |         11        0.11       94.79
          K |         18        0.18       94.97
          L |         18        0.18       95.15
          M |         20        0.20       95.35
          N |         35        0.35       95.70
          O |         35        0.35       96.05
          P |          5        0.05       96.10
          Q |         16        0.16       96.26
          R |          7        0.07       96.33
          S |         58        0.58       96.91
          T |         38        0.38       97.29
          U |         10        0.10       97.39
          V |         45        0.45       97.84
          W |          9        0.09       97.93
          X |         23        0.23       98.16
          Y |        159        1.59       99.75
          Z |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016