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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         27        0.27        0.27
          0 |        957        9.57        9.84
          1 |        883        8.83       18.67
          2 |        872        8.72       27.39
          3 |        875        8.75       36.14
          4 |        865        8.65       44.79
          5 |        867        8.67       53.46
          6 |        840        8.40       61.86
          7 |        899        8.99       70.85
          8 |        887        8.87       79.72
          9 |      1,151       11.51       91.23
          C |          1        0.01       91.24
          L |          1        0.01       91.25
          N |          1        0.01       91.26
          T |          1        0.01       91.27
          X |        873        8.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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