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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         16        0.16        0.16
          0 |        631        6.31        6.47
          1 |      2,001       20.01       26.48
          2 |      1,238       12.38       38.86
          3 |        843        8.43       47.29
          4 |        635        6.35       53.64
          5 |        926        9.26       62.90
          6 |        726        7.26       70.16
          7 |        507        5.07       75.23
          8 |        578        5.78       81.01
          9 |        780        7.80       88.81
          A |        192        1.92       90.73
          B |        139        1.39       92.12
          C |        104        1.04       93.16
          D |         70        0.70       93.86
          E |         45        0.45       94.31
          F |         38        0.38       94.69
          G |         54        0.54       95.23
          H |         68        0.68       95.91
          J |         46        0.46       96.37
          K |         27        0.27       96.64
          L |         37        0.37       97.01
          M |         21        0.21       97.22
          N |         22        0.22       97.44
          P |         29        0.29       97.73
          Q |          1        0.01       97.74
          R |         35        0.35       98.09
          S |         33        0.33       98.42
          T |         19        0.19       98.61
          U |         18        0.18       98.79
          V |         18        0.18       98.97
          W |          9        0.09       99.06
          X |         24        0.24       99.30
          Y |         23        0.23       99.53
          Z |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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