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

      vin_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         85        0.85        0.85
          0 |        934        9.34       10.19
          1 |        860        8.60       18.79
          2 |        873        8.73       27.52
          3 |        883        8.83       36.35
          4 |        850        8.50       44.85
          5 |        870        8.70       53.55
          6 |        860        8.60       62.15
          7 |        830        8.30       70.45
          8 |        826        8.26       78.71
          9 |      1,247       12.47       91.18
          B |          4        0.04       91.22
          C |          2        0.02       91.24
          D |          2        0.02       91.26
          E |          2        0.02       91.28
          F |          3        0.03       91.31
          G |          5        0.05       91.36
          H |          1        0.01       91.37
          I |          2        0.02       91.39
          K |          1        0.01       91.40
          L |          5        0.05       91.45
          N |          1        0.01       91.46
          O |         28        0.28       91.74
          P |          1        0.01       91.75
          Q |          1        0.01       91.76
          R |          1        0.01       91.77
          S |         14        0.14       91.91
          T |          2        0.02       91.93
          U |          1        0.01       91.94
          X |        789        7.89       99.83
          Y |          3        0.03       99.86
          Z |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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