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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        454        4.54        4.54
          0 |      1,669       16.69       21.23
          1 |      1,081       10.81       32.04
          2 |        924        9.24       41.28
          3 |        843        8.43       49.71
          4 |        802        8.02       57.73
          5 |        794        7.94       65.67
          6 |        669        6.69       72.36
          7 |        640        6.40       78.76
          8 |        648        6.48       85.24
          9 |      1,379       13.79       99.03
          A |          4        0.04       99.07
          B |          2        0.02       99.09
          C |         22        0.22       99.31
          F |          9        0.09       99.40
          G |          3        0.03       99.43
          L |          1        0.01       99.44
          O |          2        0.02       99.46
          S |          3        0.03       99.49
          T |          2        0.02       99.51
          U |          3        0.03       99.54
          W |          1        0.01       99.55
          X |         42        0.42       99.97
          Y |          1        0.01       99.98
          Z |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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