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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         18        0.18        0.18
          1 |         21        0.21        0.39
          2 |          5        0.05        0.44
          3 |          9        0.09        0.53
          4 |          3        0.03        0.56
          5 |          7        0.07        0.63
          6 |          7        0.07        0.70
          7 |         10        0.10        0.80
          8 |         10        0.10        0.90
          9 |        350        3.50        4.40
          A |        237        2.37        6.77
          B |        483        4.83       11.60
          C |        180        1.80       13.40
          D |        224        2.24       15.64
          E |          9        0.09       15.73
          F |      1,796       17.96       33.69
          G |      2,153       21.53       55.22
          H |      1,195       11.95       67.17
          J |        205        2.05       69.22
          K |        117        1.17       70.39
          L |         79        0.79       71.18
          M |        380        3.80       74.98
          N |        725        7.25       82.23
          P |         54        0.54       82.77
          Q |          1        0.01       82.78
          R |         15        0.15       82.93
          S |        261        2.61       85.54
          T |        823        8.23       93.77
          U |         14        0.14       93.91
          V |        189        1.89       95.80
          W |         12        0.12       95.92
          X |        175        1.75       97.67
          Y |        198        1.98       99.65
          Z |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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