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

      vin_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        100        1.00        1.00
          1 |        491        4.91        5.91
          2 |        269        2.69        8.60
          3 |        183        1.83       10.43
          4 |         81        0.81       11.24
          5 |         84        0.84       12.08
          6 |        116        1.16       13.24
          7 |         84        0.84       14.08
          8 |         72        0.72       14.80
          9 |        581        5.81       20.61
          A |        326        3.26       23.87
          B |        366        3.66       27.53
          C |        331        3.31       30.84
          D |        142        1.42       32.26
          E |        161        1.61       33.87
          F |        805        8.05       41.92
          G |      1,469       14.69       56.61
          H |        734        7.34       63.95
          I |          2        0.02       63.97
          J |        237        2.37       66.34
          K |        307        3.07       69.41
          L |        373        3.73       73.14
          M |        339        3.39       76.53
          N |        507        5.07       81.60
          O |          1        0.01       81.61
          P |        149        1.49       83.10
          Q |         47        0.47       83.57
          R |        164        1.64       85.21
          S |        239        2.39       87.60
          T |        515        5.15       92.75
          U |         32        0.32       93.07
          V |        103        1.03       94.10
          W |        115        1.15       95.25
          X |        206        2.06       97.31
          Y |        171        1.71       99.02
          Z |         98        0.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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