Frequencies for first 10,000 rows of vin_2 variable in vehicle dataset :

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         11        0.11        0.11
          1 |         29        0.29        0.40
          2 |         14        0.14        0.54
          3 |         18        0.18        0.72
          4 |          5        0.05        0.77
          5 |         12        0.12        0.89
          6 |          5        0.05        0.94
          7 |         12        0.12        1.06
          8 |         11        0.11        1.17
          9 |        430        4.30        5.47
          A |        193        1.93        7.40
          B |        499        4.99       12.39
          C |        170        1.70       14.09
          D |        237        2.37       16.46
          E |         15        0.15       16.61
          F |      1,771       17.71       34.32
          G |      2,164       21.64       55.96
          H |      1,164       11.64       67.60
          J |        198        1.98       69.58
          K |        100        1.00       70.58
          L |         84        0.84       71.42
          M |        361        3.61       75.03
          N |        672        6.72       81.75
          P |         89        0.89       82.64
          Q |          2        0.02       82.66
          R |          6        0.06       82.72
          S |        244        2.44       85.16
          T |        881        8.81       93.97
          U |         10        0.10       94.07
          V |        171        1.71       95.78
          W |         15        0.15       95.93
          X |        172        1.72       97.65
          Y |        190        1.90       99.55
          Z |         45        0.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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