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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         70        0.70        0.70
          0 |        793        7.93        8.63
          1 |      1,454       14.54       23.17
          2 |        749        7.49       30.66
          3 |        564        5.64       36.30
          4 |        495        4.95       41.25
          5 |        736        7.36       48.61
          6 |        601        6.01       54.62
          7 |        708        7.08       61.70
          8 |        621        6.21       67.91
          9 |      1,639       16.39       84.30
          A |        145        1.45       85.75
          B |         75        0.75       86.50
          C |         90        0.90       87.40
          D |         56        0.56       87.96
          E |         64        0.64       88.60
          F |         99        0.99       89.59
          G |         48        0.48       90.07
          H |        134        1.34       91.41
          J |         34        0.34       91.75
          K |         53        0.53       92.28
          L |         83        0.83       93.11
          M |         28        0.28       93.39
          N |         43        0.43       93.82
          O |         12        0.12       93.94
          P |        102        1.02       94.96
          Q |         17        0.17       95.13
          R |         58        0.58       95.71
          S |         75        0.75       96.46
          T |         79        0.79       97.25
          U |         45        0.45       97.70
          V |         18        0.18       97.88
          W |         21        0.21       98.09
          X |         18        0.18       98.27
          Y |         52        0.52       98.79
          Z |        121        1.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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