Frequencies for first 10,000 rows of vin_9 variable in vehicle dataset :

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        706        7.06        7.06
          0 |      3,169       31.69       38.75
          1 |        813        8.13       46.88
          2 |        650        6.50       53.38
          3 |        612        6.12       59.50
          4 |        499        4.99       64.49
          5 |        486        4.86       69.35
          6 |        430        4.30       73.65
          7 |        394        3.94       77.59
          8 |        379        3.79       81.38
          9 |      1,833       18.33       99.71
          A |          1        0.01       99.72
          B |          2        0.02       99.74
          C |         10        0.10       99.84
          D |          1        0.01       99.85
          F |          4        0.04       99.89
          G |          1        0.01       99.90
          L |          1        0.01       99.91
          O |          7        0.07       99.98
          P |          1        0.01       99.99
          S |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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