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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         60        0.60        0.60
          0 |        926        9.26        9.86
          1 |        980        9.80       19.66
          2 |        851        8.51       28.17
          3 |        846        8.46       36.63
          4 |        866        8.66       45.29
          5 |        857        8.57       53.86
          6 |        890        8.90       62.76
          7 |        899        8.99       71.75
          8 |        870        8.70       80.45
          9 |      1,148       11.48       91.93
          B |          1        0.01       91.94
          C |          2        0.02       91.96
          L |          2        0.02       91.98
          R |          1        0.01       91.99
          W |          1        0.01       92.00
          X |        800        8.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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