Frequencies for first 10,000 rows of vin_6 variable in vehicle dataset :

        vin |
character(6 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          3        0.03        0.03
          0 |        476        4.76        4.79
          1 |      2,045       20.45       25.24
          2 |      1,162       11.62       36.86
          3 |        953        9.53       46.39
          4 |        914        9.14       55.53
          5 |      1,125       11.25       66.78
          6 |        530        5.30       72.08
          7 |        511        5.11       77.19
          8 |        299        2.99       80.18
          9 |        659        6.59       86.77
          A |        162        1.62       88.39
          B |        189        1.89       90.28
          C |         83        0.83       91.11
          D |         42        0.42       91.53
          E |         62        0.62       92.15
          F |         48        0.48       92.63
          G |         32        0.32       92.95
          H |         35        0.35       93.30
          J |         37        0.37       93.67
          K |         23        0.23       93.90
          L |         81        0.81       94.71
          M |         54        0.54       95.25
          N |         25        0.25       95.50
          P |         49        0.49       95.99
          Q |          1        0.01       96.00
          R |         95        0.95       96.95
          S |         70        0.70       97.65
          T |         29        0.29       97.94
          U |         30        0.30       98.24
          V |         20        0.20       98.44
          W |         47        0.47       98.91
          X |         50        0.50       99.41
          Y |         25        0.25       99.66
          Z |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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