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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         62        0.62        0.62
          0 |        916        9.16        9.78
          1 |        957        9.57       19.35
          2 |        901        9.01       28.36
          3 |        874        8.74       37.10
          4 |        927        9.27       46.37
          5 |        880        8.80       55.17
          6 |        830        8.30       63.47
          7 |        851        8.51       71.98
          8 |        821        8.21       80.19
          9 |      1,210       12.10       92.29
          C |          2        0.02       92.31
          D |          1        0.01       92.32
          F |          1        0.01       92.33
          H |          1        0.01       92.34
          S |          1        0.01       92.35
          X |        765        7.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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