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

      vin_7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        199        1.99        1.99
          0 |        988        9.88       11.87
          1 |        825        8.25       20.12
          2 |        618        6.18       26.30
          3 |        493        4.93       31.23
          4 |        455        4.55       35.78
          5 |        493        4.93       40.71
          6 |        410        4.10       44.81
          7 |        367        3.67       48.48
          8 |        433        4.33       52.81
          9 |        902        9.02       61.83
          A |        237        2.37       64.20
          B |        155        1.55       65.75
          C |        325        3.25       69.00
          D |        153        1.53       70.53
          E |        108        1.08       71.61
          F |        118        1.18       72.79
          G |        164        1.64       74.43
          H |        214        2.14       76.57
          I |          2        0.02       76.59
          J |         84        0.84       77.43
          K |         70        0.70       78.13
          L |        335        3.35       81.48
          M |        102        1.02       82.50
          N |        114        1.14       83.64
          P |        108        1.08       84.72
          Q |         76        0.76       85.48
          R |        191        1.91       87.39
          S |        229        2.29       89.68
          T |         29        0.29       89.97
          U |        117        1.17       91.14
          V |         81        0.81       91.95
          W |         85        0.85       92.80
          X |        127        1.27       94.07
          Y |         59        0.59       94.66
          Z |        534        5.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016