Frequencies for first 10,000 rows of vin_7 variable in vehicle dataset :

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         34        0.34        0.34
          0 |        520        5.20        5.54
          1 |      1,302       13.02       18.56
          2 |      1,140       11.40       29.96
          3 |        736        7.36       37.32
          4 |      1,484       14.84       52.16
          5 |        788        7.88       60.04
          6 |        866        8.66       68.70
          7 |        491        4.91       73.61
          8 |        526        5.26       78.87
          9 |      1,107       11.07       89.94
          A |         77        0.77       90.71
          B |         23        0.23       90.94
          C |         58        0.58       91.52
          D |         44        0.44       91.96
          E |         65        0.65       92.61
          F |         39        0.39       93.00
          G |         31        0.31       93.31
          H |         32        0.32       93.63
          J |         45        0.45       94.08
          K |         28        0.28       94.36
          L |         92        0.92       95.28
          M |         43        0.43       95.71
          N |          9        0.09       95.80
          P |         35        0.35       96.15
          Q |         12        0.12       96.27
          R |         47        0.47       96.74
          S |         40        0.40       97.14
          T |         10        0.10       97.24
          U |         21        0.21       97.45
          V |         11        0.11       97.56
          W |         13        0.13       97.69
          X |         36        0.36       98.05
          Y |        125        1.25       99.30
          Z |         70        0.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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