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

      vin_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          7        0.07        0.07
          - |          1        0.01        0.08
          0 |        927        9.27        9.35
          1 |      1,218       12.18       21.53
          2 |        864        8.64       30.17
          3 |      1,271       12.71       42.88
          4 |        595        5.95       48.83
          5 |        650        6.50       55.33
          6 |        575        5.75       61.08
          7 |        788        7.88       68.96
          8 |        407        4.07       73.03
          9 |      1,587       15.87       88.90
          A |        154        1.54       90.44
          B |         73        0.73       91.17
          C |        113        1.13       92.30
          D |         44        0.44       92.74
          E |         17        0.17       92.91
          F |         38        0.38       93.29
          G |         92        0.92       94.21
          H |         37        0.37       94.58
          I |          3        0.03       94.61
          J |         51        0.51       95.12
          K |         16        0.16       95.28
          L |         86        0.86       96.14
          M |         21        0.21       96.35
          N |          7        0.07       96.42
          O |         15        0.15       96.57
          P |          9        0.09       96.66
          Q |          1        0.01       96.67
          R |         29        0.29       96.96
          S |         44        0.44       97.40
          T |         35        0.35       97.75
          U |          5        0.05       97.80
          V |         11        0.11       97.91
          W |          2        0.02       97.93
          X |          4        0.04       97.97
          Y |        185        1.85       99.82
          Z |         17        0.17       99.99
          | |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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