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

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          8        0.08        0.08
          0 |        397        3.97        4.05
          1 |        965        9.65       13.70
          2 |      1,553       15.53       29.23
          3 |      1,123       11.23       40.46
          4 |      1,072       10.72       51.18
          5 |        609        6.09       57.27
          6 |      1,030       10.30       67.57
          7 |        498        4.98       72.55
          8 |        928        9.28       81.83
          9 |        916        9.16       90.99
          A |         69        0.69       91.68
          B |         78        0.78       92.46
          C |        131        1.31       93.77
          D |         73        0.73       94.50
          E |         74        0.74       95.24
          F |         16        0.16       95.40
          G |         27        0.27       95.67
          H |         32        0.32       95.99
          J |         26        0.26       96.25
          K |         16        0.16       96.41
          L |         61        0.61       97.02
          M |         31        0.31       97.33
          N |          7        0.07       97.40
          O |          1        0.01       97.41
          P |         63        0.63       98.04
          R |         14        0.14       98.18
          S |          8        0.08       98.26
          T |         17        0.17       98.43
          U |          4        0.04       98.47
          V |         27        0.27       98.74
          W |         48        0.48       99.22
          X |          6        0.06       99.28
          Y |         56        0.56       99.84
          Z |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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