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

      vin_6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         47        0.47        0.47
          0 |      1,045       10.45       10.92
          1 |      1,548       15.48       26.40
          2 |        846        8.46       34.86
          3 |        681        6.81       41.67
          4 |        604        6.04       47.71
          5 |        628        6.28       53.99
          6 |        733        7.33       61.32
          7 |        590        5.90       67.22
          8 |        644        6.44       73.66
          9 |      1,170       11.70       85.36
          A |        280        2.80       88.16
          B |         89        0.89       89.05
          C |         98        0.98       90.03
          D |        115        1.15       91.18
          E |         75        0.75       91.93
          F |         72        0.72       92.65
          G |         54        0.54       93.19
          H |        146        1.46       94.65
          J |         47        0.47       95.12
          K |         42        0.42       95.54
          L |         58        0.58       96.12
          M |         31        0.31       96.43
          N |         31        0.31       96.74
          P |         54        0.54       97.28
          Q |          8        0.08       97.36
          R |         36        0.36       97.72
          S |         43        0.43       98.15
          T |         37        0.37       98.52
          U |         19        0.19       98.71
          V |         17        0.17       98.88
          W |         17        0.17       99.05
          X |         21        0.21       99.26
          Y |         17        0.17       99.43
          Z |         57        0.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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