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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,917       59.17       59.17
          0 |        343        3.43       62.60
          1 |        310        3.10       65.70
          2 |        287        2.87       68.57
          3 |        320        3.20       71.77
          4 |        325        3.25       75.02
          5 |        320        3.20       78.22
          6 |        291        2.91       81.13
          7 |        313        3.13       84.26
          8 |        289        2.89       87.15
          9 |        983        9.83       96.98
          A |          1        0.01       96.99
          B |          5        0.05       97.04
          C |          1        0.01       97.05
          F |          5        0.05       97.10
          G |          4        0.04       97.14
          H |          1        0.01       97.15
          L |          1        0.01       97.16
          O |          1        0.01       97.17
          S |          3        0.03       97.20
          U |          2        0.02       97.22
          X |        278        2.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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