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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          2        0.02        0.02
          0 |         26        0.26        0.28
          1 |         62        0.62        0.90
          2 |         23        0.23        1.13
          3 |         10        0.10        1.23
          4 |          7        0.07        1.30
          5 |         14        0.14        1.44
          6 |          7        0.07        1.51
          7 |         11        0.11        1.62
          8 |         15        0.15        1.77
          9 |        423        4.23        6.00
          A |        177        1.77        7.77
          B |        615        6.15       13.92
          C |        172        1.72       15.64
          D |         91        0.91       16.55
          E |         21        0.21       16.76
          F |      1,884       18.84       35.60
          G |      2,250       22.50       58.10
          H |      1,100       11.00       69.10
          J |        188        1.88       70.98
          K |         87        0.87       71.85
          L |        104        1.04       72.89
          M |        410        4.10       76.99
          N |        656        6.56       83.55
          O |          1        0.01       83.56
          P |        120        1.20       84.76
          Q |          2        0.02       84.78
          R |         11        0.11       84.89
          S |        209        2.09       86.98
          T |        757        7.57       94.55
          U |          6        0.06       94.61
          V |        180        1.80       96.41
          W |         16        0.16       96.57
          X |        158        1.58       98.15
          Y |        160        1.60       99.75
          Z |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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