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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         16        0.16        0.16
          0 |        675        6.75        6.91
          1 |      1,957       19.57       26.48
          2 |      1,165       11.65       38.13
          3 |        814        8.14       46.27
          4 |        616        6.16       52.43
          5 |        883        8.83       61.26
          6 |        720        7.20       68.46
          7 |        537        5.37       73.83
          8 |        554        5.54       79.37
          9 |        876        8.76       88.13
          A |        231        2.31       90.44
          B |        128        1.28       91.72
          C |         93        0.93       92.65
          D |         77        0.77       93.42
          E |         48        0.48       93.90
          F |         41        0.41       94.31
          G |         59        0.59       94.90
          H |         78        0.78       95.68
          J |         44        0.44       96.12
          K |         31        0.31       96.43
          L |         45        0.45       96.88
          M |         24        0.24       97.12
          N |         20        0.20       97.32
          P |         24        0.24       97.56
          Q |          2        0.02       97.58
          R |         27        0.27       97.85
          S |         33        0.33       98.18
          T |         31        0.31       98.49
          U |         21        0.21       98.70
          V |         17        0.17       98.87
          W |         20        0.20       99.07
          X |         28        0.28       99.35
          Y |         26        0.26       99.61
          Z |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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