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

        vin |
character(9 |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         17        0.17        0.17
          0 |        901        9.01        9.18
          1 |        865        8.65       17.83
          2 |        902        9.02       26.85
          3 |        858        8.58       35.43
          4 |        877        8.77       44.20
          5 |        857        8.57       52.77
          6 |        860        8.60       61.37
          7 |        871        8.71       70.08
          8 |        846        8.46       78.54
          9 |      1,308       13.08       91.62
          D |          1        0.01       91.63
          T |          1        0.01       91.64
          X |        835        8.35       99.99
          Z |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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