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

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         15        0.15        0.15
          0 |        374        3.74        3.89
          1 |      1,116       11.16       15.05
          2 |      1,526       15.26       30.31
          3 |        876        8.76       39.07
          4 |      1,291       12.91       51.98
          5 |        823        8.23       60.21
          6 |      1,033       10.33       70.54
          7 |        422        4.22       74.76
          8 |        632        6.32       81.08
          9 |      1,079       10.79       91.87
          A |         62        0.62       92.49
          B |         40        0.40       92.89
          C |         59        0.59       93.48
          D |         36        0.36       93.84
          E |         77        0.77       94.61
          F |         14        0.14       94.75
          G |         16        0.16       94.91
          H |         32        0.32       95.23
          J |         16        0.16       95.39
          K |         14        0.14       95.53
          L |         62        0.62       96.15
          M |         37        0.37       96.52
          N |         12        0.12       96.64
          P |         34        0.34       96.98
          Q |          1        0.01       96.99
          R |         31        0.31       97.30
          S |         26        0.26       97.56
          T |         12        0.12       97.68
          U |         18        0.18       97.86
          V |         25        0.25       98.11
          W |         25        0.25       98.36
          X |         23        0.23       98.59
          Y |         87        0.87       99.46
          Z |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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