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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          2        0.02        0.02
          0 |        418        4.18        4.20
          1 |      2,521       25.21       29.41
          2 |      1,246       12.46       41.87
          3 |        866        8.66       50.53
          4 |        712        7.12       57.65
          5 |      1,423       14.23       71.88
          6 |        541        5.41       77.29
          7 |        444        4.44       81.73
          8 |        314        3.14       84.87
          9 |        604        6.04       90.91
          A |        135        1.35       92.26
          B |        155        1.55       93.81
          C |         63        0.63       94.44
          D |         47        0.47       94.91
          E |         28        0.28       95.19
          F |         19        0.19       95.38
          G |         29        0.29       95.67
          H |         53        0.53       96.20
          J |         27        0.27       96.47
          K |         10        0.10       96.57
          L |         25        0.25       96.82
          M |         58        0.58       97.40
          N |         11        0.11       97.51
          O |          1        0.01       97.52
          P |         21        0.21       97.73
          R |         41        0.41       98.14
          S |         65        0.65       98.79
          T |         14        0.14       98.93
          U |         21        0.21       99.14
          V |         11        0.11       99.25
          W |         21        0.21       99.46
          X |         22        0.22       99.68
          Y |          5        0.05       99.73
          Z |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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